help me- i hate science sm-
What makes the Noble Gases the least reactive elements on the periodic table?
They all have one valence electron in their outer shell.
They all have seven electrons in their outer shell.
They all have eight valence electrons in their outer shell.
All of the elements have a full outer electron shell.
sorry im slow yall
The reason the Noble Gases, the least reactive elements on the periodic table, are they all have eight valence electrons in their outer shell. The correct option is C.
What are noble gases?Noble gases are the gases of the periodic table that contain a fully filled last orbital with electrons, that is why they are called noble gases. These gases are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).
Noble gases are the least reactive elements because they have fully filled the last orbital, which means they do not need any electrons from others, nor do they have to donate any electron to fulfilled their orbitals.
Elements react with each other by sharing electrons with each other. They either donate or accept electrons from others and form bonds with each other.
Thus, the correct option is C. They all have eight valence electrons in their outer shell.
To learn more about noble gases, refer to the link:
https://brainly.com/question/11764545
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3. The cities listed below, from Chicago to Pittsburgh, lie in a roughly straight west to east line. Data on temperature, barometric pressure, and sky conditions for each city are shown in the table below. Use the data to explain what types of air masses are present and/or moving among these cities and how this accounts for the weather. What will Pittsburgh’s weather be like within the next 24 to 48 hours?
City Temp (oF) Pressure (in.) Conditions
Chicago, IL 73 29.94 rising Clear
Indianapolis, IN 75 29.93 falling Partly cloudy
Columbus, OH 78 28.20 falling Light rain
Pittsburgh, PA 74 29.90 steady Mostly sunny
Answer:
For the next 24-48 hours, Pittsburgh will see light rain. The storm is moving west-to-east toward Pittsburgh, as indicated by a drop in pressure over western cities. Precipitation is usually associated with low pressure systems.
What is weather forecasting?Weather forecasting is the application of science and technology to predict atmospheric conditions at a particular place and time.People have been trying to predict the weather informally for thousands of years, but have been doing so formally since the 19th century.Weather forecasting is the application of science and technology to predict atmospheric conditions for a particular place and time.Humans have tried to predict the weather informally for thousands of years, but only formally since the 19th century due to incomplete understanding of the ocean, measurement errors in initial conditions, atmosphere and related processes.Weather warnings are important forecasts that protect lives and property.Forecasts based on temperature and precipitation are important for agriculture and therefore for commodity market traders. Temperature forecasts are used by utility companies to forecast demand for the next few days.Many people use the daily weather forecast to decide what to wear on any given day.To learn more about weather forecasting, refer to:
brainly.com/question/24730207
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Plz answer in order and no wasting my points
Answer:
1. Fossil Fuels
2. Burning Fossil Fuels
3. Photosynthesis
4. Plants
5. Deforestation
6. Rivers
7. Atmosphere
Explanation:
I am only sure about 1, 2, and 6 because it is very blurry.
Hope this helped!
What s the highest viscosity?
Shampoo
Pure Water
Toothpaste
Soapy Water
PLz help
When a nonmetal bonds with another nonmetal, what type of bond is created?
Nonmetals never bond with nonmetals
Metallic
Covalent
Ionic
Answer: Ionic
Explanation:
Hi if u see this help me please
Answer:
Amoebas, Yeasts, Hydras, and Ferns only
Explanation:
This is because they can asexually reproduce which is why their offspring wil be identical
Answer:
Amoebas, yeasts, hydras, and ferns
Explanation:
In which pair of elements are both metalloids?
Sn and Sb
Sb and Te
Te and I
I and Xe
Answer:
Sb and Te
Explanation:
there are on the stair step
I need help due today!!!!!
Answer:5
grams per cubic centimeter
Explanation:
Note:
1
ml
=
1
cc
If the water rose
7
ml
−
2
ml
=
5
ml
then the stone had a volume of
5
ml
or
5
cc
With a mass of
25
g
it must have a density of
XXX
25
g
5
cc
=
5
g/cc
Explanation:
A new wind farm that uses wind energy to generate electricity has to be set up in an area. Which of the following areas would be best suited to set up the wind farm?
possible answer: 1. Along the coast
2. In a forest
3. Neighboring a city
4. Near a coal mine
the answer is 1 along the coast
PLEASE HELP BRAINLIEST 4 BEST ANSWER
Use the site above and pick any 5 elements and write a research report for 5 different elements. ( 3 sentence minimum per element)
Include the Name, Symbol, Atomic Number, Atomic Mass, and Common Human uses of element, if its present in a common molecule and if its dangerous to humans.
Answer:
Helium. Symbol for Helium is: He . The atomic number (Z) is: 2. The mass number (A): 4. Common human uses of the element: Because it is very unreactive, helium is used to provide an inert protective atmosphere for making fiber optics and semiconductors, and for arc welding. Helium is also used to detect leaks, such as in car air-conditioning systems, and because it diffuses quickly it is used to inflate car airbags after impact. present in a common molecule: Helium does not bond with the other atoms. if its dangerous: helium can cut off oxygen supply or can cause an embolism if a person inhales too deeply.
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Carbon. Symbol: C. The atomic number (Z): 6. The mass number (A): 12. Common human uses of the carbon: is used in metal smelting. It is particularly important in the iron and steel industries. Graphite is used in pencils, to make brushes in electric motors and in furnace linings. Activated charcoal is used for purification and filtration. The carbon atom has unique properties that allow it to form covalent bonds to as many as four different atoms, making this versatile element ideal to serve as the basic structural component, or “backbone,” of the macromolecules. Individual carbon atoms have an incomplete outermost electron shell. If its dangerous: Elemental carbon is of very low toxicity. Health hazard data presented here is based on exposures to carbon black, not elemental carbon. Chronic inhalation exposure to carbon black may result in temporary or permanent damage to lungs and heart.
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Sodium. The Symbol: Na. Atomic number: 11. Mass number: 23. Common human uses : Sodium is important for many different functions of the human body. For example, it helps cells to transmit nerve signals and regulate water levels in tissues and blood. Sodium is the sixth most common element on Earth, and makes up 2.6% of the Earth's crust. The most common compound is sodium chloride. The most common compound of sodium is sodium chloride (common salt). If its dangerous: Sodium is essential to human health, but too much sodium is poisonous. Sodium poisoning can cause seizures, coma, and death.
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Nitrogen. Symbol: N. Atomic number :7. Mass number: 14. Common human uses :Human activities, such as making fertilizers and burning fossil fuels, have significantly altered the amount of fixed nitrogen in the Earth's ecosystems. If its present in a common molecule: Common compounds with nitrogen atoms include ammonia (NH3), nitrous oxide (N2O), nitrites, and nitrates. Nitrogen is also found in organic compounds such as amines, amides, and nitro groups. If its dangerous: High concentrations of nitrogen gas can be particularly harmful to human health. Nitrogen can displace oxygen from ambient air within an enclosed space leading to a dangerous build-up of the inert gas.
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Potassium. Symbol: K. Atomic number: 19. Mass number:39. Common human uses: Potassium is a mineral that plays many important roles in the body. Food sources of potassium include fruits (especially dried fruits), cereals, beans, milk, and vegetables. Potassium is most commonly used for treating and preventing low potassium levels, treating high blood pressure, and preventing stroke. If its present in a common molecule: Potassium forms many important compounds. Potassium chloride (KCl) is the most common potassium compound. It is used in fertilizers, as a salt substitute and to produce other chemicals. Potassium hydroxide (KOH) is used to make soaps, detergents and drain cleaners. If its dangerous: Having too much potassium in your blood can be dangerous. Potassium affects the way your heart's muscles work. When you have too much potassium, your heart may beat irregularly, which in the worst cases, can cause heart attack.
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Answer:
The correct answer's B, give brainly if this helped :)
Explanation:
Which two factors decrease as the kinetic energy of the particles in an object decreases?
giving brainliest
a
The object's weight.
b
The object's temperature.
c
The speed of the particles.
d
The size of the particles.
Answer
ummm maybe c or d
dont count on me though!
Explanation:
In the Bohr model of an atom (shown), protons are represented in blue, the neutrons are red and the electrons are green. How reactive is the element that this model represents?
Non-reactive because the model is showing two complete electron shells
Highly reactive because the model has two complete electron shells
Non-rective because the model is showing only one valence electron
Highly reactive because the model is showing only one valence electron.
Answer:
2nd one I think
Explanation:
hope this helps
What is true about all matter?
It is made up of mixtures.
It has the same characteristics.
It has mass and takes up space.
It is made up molecules.
Answer:
It has mass and takes up space
Explanation:
Just did something similar like this 10 minutes ago lol
Which phase of matter can be described as having molecules that are tightly packed together with a definite shape?
A. gas
B. solid
C. plasma
D. liquid
Answer:
D. Liquid
Explanation:
Solid matter is composed of tightly packed particles. A solid will retain its shape; the particles are not free to move around. Liquid matter is made of more loosely packed particles. It will take the shape of its container.
Compare how a positively charged object and a negatively charged object will react when each is placed separately near an uncharged object.
Plz help 10 points!!!!!!
Answer:
Where are all my chemistry geniuses at??
1. 2HG + O2 = 2HGO
2. Ca + 2H2O = Ca(OH)2 + H2
3. H2 + Cl2 = 2HCl
4. Fe + S = FeS
Explanation:
Hope it helped!
Answer:
Mercury and oxygen react to yield mercuric oxide. > 2Hg + O2 = 2HgO
Calcium and water react to yield calcium hydroxide and hydrogen. > Ca + 2H2O = Ca(OH)2 + H2
Hydrogen and chlorine react to yield hydrochloric acid. > H2 + Cl2 = 2HCl
Iron and sulfer react to yield iron sulfide. > Fe + S = FeS
Explanation:
Sasha placed a few objects one by one near a magnet. Only two of the objects Sasha placed moved toward the magnet. Which of the following are most likely to be those two objects?
possible answer: 1. Aluminum foil and iron nails
2. Metal paper clip and iron nails
3. Rubber band and plastic spoon
4. Steel spoon and rubber band
Answer:
.
Explanation:
Answer:
#2 Metal paper clip and iron nails
Explanation:
This is because they are both magnetic. Hope this helps. :)
ik im not right.. or am i?
Answer:
C
Explanation:
Average Speed = total distance covered / total time taken
the distance she covered didnt change because the race track stayed 5km.
However, she did take a longer time to complete the race because she stopped in the middle to tie her shoes
Therefore, C is the answer.
Which of the following groups of resources helps generate electricity and does not cause a lot of pollution?
possible answer: 1. Phosphate, oil, and water
2. Phosphate, oil, and silica
3. Wind, solar, and silica
4. Wind, solar, and water
Answer:
4
Explanation:
wind is used to run wind mills
solar the sun ray are converted into electricity using solar panel
water produces hydropower
A student climbed up the hill at a constant speed, stopped at the top, and then ran quickly down the other side.
Which graph below most likely represents this scenario?
Answer:
The Answer Is C
Explanation:
Which →two← factors decrease as the kinetic energy of the particles in an object decreases?
a
The object's weight.
b
The object's temperature.
c
The speed of the particles.
d
The size of the particles.
Answer:
a and c
Explanation:
I'm only sure on a but c is the second best so Yea don't completely trust it
Based on the food web, which of the following would occur if the snake population was to increase?
a
The hawk population would increase
b
The mouse population would increase
c
The hawk population would decrease
d
The grasshopper population would decrease
Answer:
c i think
Explanation:
becuse hawks hunt snakes for food aslo becuse
Answer:
its A. The hawk population would increase
Explanation:
because if there is alot of snakes then the hawks will have more to eat
Which Item is denser than liquid water?
A. Metal fork
B. Plastic cup
C. Paper plate
D. Wooden spoon
Answer:
B
Explanation:
metal is denser, wood will float and so will paper and plastic
Use this picture to explain that an electrically charged object can attract an uncharged object without any contact. Your answer should be at least three sentences long.
a balloon hanging from a string with small pieces of paper stuck to the bottom of it, with a few pieces on the ground
Answer:
Charges: positive and negative
Explanation:
When we put a charged object near an uncharged object, it produces opposite charges in the near end of the uncharged object by electric induction. In the figure, we can see that the ballon has charges which produces opposite charges in the paper which is uncharged
Which ocean depth has some illumination but not enough for plant photosynthesis?
epipelagic zone
abyssopelagic zone
bathypelagic zone
mesopelagic zone
Answer:
c abyssopelagic zone
Explanation:
Answer:
the answer is D. Mesopelagic Zone
Explanation:
i know the answer is the 'Twilight Zone,' but its scientific name is the Mesopelagic Zone
Fill in the missing properties in the table below. pleaseeeeeeeeeeeeeeeeee helpppppppppppp
streak, hardness, crystal form
reaction with acid, magnetism, specific gravity, tenacity, taste, odor , feel, and presence of striations
Answer:
3. Mohs hardness scale
4. Streak
5. Density
6. Crystal
Explanation:
I hope this helps :)
what are disadvantages and advantages for seahorses plz helpp i need it for science nd i need it in by 11:59 plz help im struggling and i need my grades upp PLZZZZZZ
Answer:
Seahorses: Disadvantages-Because of the amount of mating and giving birth, it can make the male tired. Another disadvantage is that whilst the male is carrying them he gets aggressive. ... Advantages-They give birth to loads of seahorses so a lot of them will survive.
After an impact involving a non-functioning satellite, a paint chip leaves the surface of the satellite at a speed of 96 m/s. After 17 seconds, how far has the chip traveled?
Answer:
1,632 meters.
Explanation:
Answer:
1,632 m i think
Explanation:
m = meters
think of another way that people can detect carbon monoxide is in the air
Answer:
YOu fart
Explanation:
gas