Answer:
francium
Explanation:
Atomic radii bary in a predictable across the periodic table.
The atomic radius elements increases down a group. Hence in the halogen group the last element in the group that is I have the largest radius.
What is atomic radius?Atomic radius is the distance is the distance from the nucleus to the valence orbital. The atomic radius depends on the electronegativity and number of electrons in the atom.
In periodic table, atomic radius decreases from left to right because, the electronegativity that is the ability of atomic nucleus to attracts its electron increases and thereby the atoms shrinks.
Down a group the number of shells increases and thereby electrons are more screened from the nuclear attractive pulling. Therefore in the group from fluorine, chlorine, bromine and iodine, iodine has the less electronegativity and thus largest radius.
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Which type of of star cluster is loose and disorganized? A. binary B. eclipse C. globular or D. open.
Answer:
Open cluster
Explanation:
Why should I explain?
Answer: D open cluster
Explanation:
What is the term for what happens when light travels from one medium to another?
Answer:
is there any answer choices????
Answer:
The answer is Refraction
If the wavelength of light will cause electrons to be removed from the metal (creating the photoelectric effect). What is the effect of doubling the photon flux of light?
Answer:
The number of photoelectrons are increased
Explanation:
According to Albert Einstein, when light falls on a clean metal surface, electrons are ejected from the clean metal surface. This is known as photo electric effect.
The kinetic energy of the emitted photoelectron depends on the energy of the incident photon and the work function of the metal. If the energy of the incident photon is less than the work function of the metal, photoelectric effect does not occur.
Below a given threshold frequency or wavelength called the threshold frequency or threshold wavelength photoelectric effect does not occur.
However, doubling the photon flux of light doubles the intensity of the light. This only leads to increase in the number of photons and have nothing to do with the energy of the emitted photoelectrons.
The net force on a vehicle that is accelerating at a rate of 1.5 m/s2 is 1,800 newton's. What is the mass of the vehicle to the nearest kilogram?
Answer:
1200 kgExplanation:
The mass of the vehicle can be found by using the formula
[tex]m = \frac{f}{a} \\ [/tex]
f is the force
a is the acceleration
From the question we have
[tex]m = \frac{1800}{1.5} \\ [/tex]
We have the final answer as
1200 kgHope this helps you
How do I calculate Molar Mass
Answer:
Explanation:
The molar mass is the mass of a given chemical element or chemical compound (g) divided by the amount of substance (mol).
The molar mass of a compound can be calculated by adding the standard atomic masses (in g/mol) of the constituent atoms. hope this helps...
Temperature is a(n)
ecosystem.
component of an ecosystem.
Answer:
Temperature is an abiotic component of an ecosystem
Explanation:
Witch type of force is a contact force
A-strong nuclear force
B-gravity
C-friction
D-electromagnetic force
Answer: D
Explanation:
Answer:
C. Friction
Explanation:
Because friction needs contact to occur, the other forces do not require contact like friction does.
hEEEYYYY peeps! this is the same related question about another scientist with the cells, so yeaaaaaah...btw meh teacher also made dis as well:>
Answer:
im pretty sure it is D
Explanation:
this is an old term for a microscopic organisms that included bacteria, protozoans, and very small animals
A helium balloon has a volume of 2.00L at 101kpa. As the balloon rises the pressure drops to 97.0kPa. What is the new volume?
Answer:
2.08L
Explanation:
V1 = 2.00L
P1 = 101kPa
P2 = 97.0kPa
V2 = ?
from Boyle's law,
P1V1 = P2V2
101 × 2 = 97 × V2
V2 = 202/97 = 2.08L
Therefore, the new volume is 2.08L
Answer:
2.1L
Explanation:
Given parameters:
Initial volume = 2L
Initial pressure = 101kPa
Final pressure = 97kPa
Unknown:
Final or new volume = ?
Solution:
Now to solve his problem which relates pressure and volume, we simply apply Boyle's law which is mathematically expressed below;
P₁ V₁ = P₂ V₂
P and V are pressure and volume
1 and 2 are initial and final states;[tex]\frac{101 x 2}{97}[/tex]
101 x 2 = 97 x V₂
V₂ = [tex]\frac{101 x 2}{97}[/tex]
V₂ = 2.1L
calculate the chemical amount of ammonia present in a 11.22g sample of the compound
Answer:
3.97 x 10²³atoms
Explanation:
Given parameters:
Mass of ammonia = 11.22g
Unknown:
Chemical amount of ammonia present = ?
Solution:
The chemical amount present in a substance is the number of atoms it contains.
To solve this problem, from the given mass find the number of moles first.
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of NH₃ = 14 + 3(1) = 17g/mol
Number of moles = [tex]\frac{11.22}{17}[/tex] = 0.66mole
1 mole of any substance contains 6.02 x 10²³ atoms
0.66 mole of ammonia will contain 0.66 x 6.02 x 10²³ atoms
= 3.97 x 10²³atoms
1.what PROCESS describes the water moving through a membrane?
2.water flows across a cell membrane from where it is-
Answer:
Osmosis is the process that describes water moving through a membrane.
I am not sure about the second question.
Explanation:
Dalton incorporated the law of conservation of mass into his atomic theory by asserting that
Answer:
a. atoms are indivisible. ... atoms can not be destroyed in chemical reactions.
Explanation:
Hope this helped :D
Predict the missing particle or nuclide.
239 Np -> 239 Pu + ?
93 94
Select one:
a. alpha emission
b. beta migus emission
c. positron emission
Answer:
beta minus emission
Explanation:
Beta radiations:
Beta radiations are result from the beta decay in which electron is ejected. The neutron inside of the nucleus converted into the proton an thus emit the electron which is called β particle.
The mass of beta particle is smaller than the alpha particles.
They can travel in air in few meter distance.
These radiations can penetrate into the human skin.
The sheet of aluminum is used to block the beta radiation
²³⁹₉₃Np→ ²³⁹₉₄Pu + ⁰₋₁e
The beta radiations are emitted in this reaction. The one electron is ejected and neutron is converted into proton.
185 L of Cl2 is how many moles of Cl2?
what material is a pure substsane
Answer:
salt, sugar, and so on.
Explanation:
A pure substance is a material that has a constant composition, and has the same properties throughout the sample. pure substances in chemical equations form predictable products. In chemistry, a pure substance has only one type of atom , molecule, or compound.
Fruit fly cells have 8 chromosomes. After mitosis, you would expect a resulting fruit fly daughter cell to have how many chromosomes? Explain your answer.
After mitosis, it is expected that the daughter cells of a fruit fly with 8 chromosomes should have 8 chromosomes.
MITOSIS:
Mitosis is the kind of cell division in which a single cell produces two daughter cells that are genetically identical to the parent cell. Mitosis results in daughter cells that possess the same number of chromosomes as the parent cell, hence, it is called duplication division. This means that mitotic division maintains the chromosome number of parents in the daughter cells. For example, a fruit fly with 8 chromosomes will produce daughter cells with 8 chromosomes each. Therefore, after mitosis, it is expected that the daughter cells of a fruit fly with 8 chromosomes should have 8 chromosomes.Learn more at: https://brainly.com/question/3327479?referrer=searchResults
WILL GIVE 50 POINTS AND BRAINLIEST!!!!!
Co^3+ and BrO^- what is the empirical formula and name? K^+ and C2H3O2^- what is the empirical formula and name of compound?
Which one of Steno’s principles is responsible for the thin undisturbed layers found in the Grand Canyon?
Answer:
Explanation:
The answer is principle of original lateral
Continuity. Hope this helps
Please help ASAP
Calculate the acceleration of this object. Remember, acceleration = net force / mass
Question 4 options:
1.7 m/s2
17,000 m/s2
2.3 m/s2
2 m/s2
Answer:
I’ll put the answer the comments if you can give the actual question
Explanation:
How do S waves move through the earth?
A. S waves move the fastest
B. S waves move parallel to the force applied
C. S waves move perpendicular to the force applied
D. S waves move in every possible direction
Answer:
I believe that its B
Explanation:
google lol
What is the atomic number for 1s2,2s2,2p6,3s1
Answer: the atomic number is 11
Explanation: using a electron configuration chart you can see that 3s1 stops on Na which is 11 on the table
which of the following is a property of a pure substance
Answer:
something with one particle/atom
Explanation:
An isotope is an atom that has a different_______from it’s parent atom, meaning it has lost or gained______.
Answer:
1- number of neutrons
2- mass
Explanation:
questions:
3Na2SO4
b. How many total atoms of Na are represented in the formula?
How can you find out what substances
Answer: Melting or boiling
Explanation:
Melting or boiling point is another property that scientists can use to identify a substance. Melting point is the temperature at which a substance changes from solid → liquid. Boiling point is the temperature at which a substance changes from liquid → gas.
HELP!! An unknown solution has a pH reading of 8.4. Which statement is true about this solution?
A. The solution is a strong acid.
B. The solution is a strong base.
C. The solution is a weak acid.
D. The solution is a weak base.
Answer:
D- a weak base
Explanation:
The ph scale goes from 1-10 a solution over 7ph is classified as basic. A solution thats 8.4 is only 1.4 over 7pH, making it a weak basic solution. An example of a strong base would be a solution with a pH of 9.2 (for example).
Answer:
D.) The solution is a weak base
Explanation:
I got it correct on founders education
What type of elements make up ionic bonds?
Ionic bonds are formed between ionic compounds, Ionic compounds are formed when metals join with nonmetals.
What are ionic bonds?Ionic bonds are electrostatic bonds that are formed between metals and nonmetals. It is an electrostatic attraction between oppositely charged ions in a chemical compound.
These bonds are formed when two or more atoms lose or gain electrons. An example of ionic bonds can be seen in the NaCl compound.
Na⁺ + Cl⁻ = Na⁺Cl⁻
NaCl is formed by the joining of oppositely charged elements. They constitute salt. Salt is made up of ionic compounds, so it easily dissociates into sodium and chloride when mixed in water.
Thus, ionic compounds are created when metals combine with nonmetals, and these combinations result in the formation of ionic bonds.
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true or false an object's weight is a force that depends on gravity
Answer:
True
I studied science physics pls mark me brainliest thanks
Answer:
true
Explanation:
Weight is calculated accounting for gravity, which is why a person weighs less on the moon than on Earth.
HTH :)
The air around the equator has a high temperature, so it has a _______ air pressure. *
Explanation:
The air around the equator has a high temperature, so it has a _lower_____ air pressure
True or false Different types of atoms can bond together to make molecules
Answer:
true
Explanation:
because if you really take a moment to think about it atoms are made of molecules.