PLEASEEE answer correctly! I will give u 10pts and brainleist if u get it right please:) (SCIENCE)

Answer:

The answer is 2

Explanation:

when viewed from earth number 2 would be a waning gibbous

write the name of the first twenty elements with their symbols and their atomic number​

A compound is 39.97% carbon, 13.41% hydrogen, and 46.62% nitrogen. What is the empirical formula?

Make
a claim about why cells need ribosomes.
Summarize evidence to support the claim
and explain your reasoning.
ls?

Matter is anything that takes up _______, has _______, and is made up of particles.

When turgor pressure is high enough in a cell, the cell walls become _____

Carbon tetrafluoride, CF, contains four identical C-F bonds. Fluorine is more
electronegative than carbon. How will this impact each of the bonds between carbon and
fluorine?
a. The electrons in each C-F bond will be more attracted to the carbon atom.
b. The electrons in each C-F bond will be attracted equally to both atoms.
C. The electrons in each C-F bond will be more attracted to the fluorine atom.
d. The electrons in each C-F bond will separate easily.

true or false, during a change of state, the thermal energy gained or lost by a material changes the kinetic energy of its particles

picture *** pls help

Calculate the atomic mass of copper if copper-63 is 69.17% abundant and copper-65 is 30% abundant

What happens when the two atoms are Too close

Please answer correctly !!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!

What quantity is needed to convert between the moles of a
given sample of a substance and its mass in grams?
a the molar mass of the substance
b the density of the substance
с
the physical state of the substance
d all of the above
Check it

Observe: Look at the red lithium atom and the blue oxygen atom. Recall that most atoms are stable when their outermost ring has eight electrons. (Some atoms, such as lithium and beryllium, are stable when their outermost ring has two electrons.)

How many electrons will the lithium atom give up to become stable?

1. eight

2. seven

3. two

4. one

True or False: The only planet that has gravity is the Earth.
O True
False

Help please:)

what happens if the temperature of a system at equilibrium is increased?

What would be one way to avoid static electricity? А) Dry cotton fabrics and synthetic fabrics separately. B) Run a metal clothes hanger across your dry hair. C Use a blow dryer to dry your hair. D Wear shoes with rubber soles.​

A rocket will rotate about a single point called the _?

Composed of two flat pins or flat holes for the live and neutral wire, commonly found in the household here in the Philippines.
A.)Fuse
B.)circuit breaker
C.)Type A electrical plug or outlet
D.)Type B plug or outlet

Science subject

what are the energy transformations taking place in your alarm clock

PLEASE HELP I WILL GIVE BRAINLIEST!!! Its due tonight at 12:00

RIGHT ANWSER WILL BE MARKED BRAINLIEST

A diver's tank contains helium at 924 psi,
nitrogen at 1456 psi and oxygen. The total
pressure is 2803 psi. What partial pressure is
exerted by the oxygen?

What do you think it means to "use safe cooking practices?"​

Which of the following equations of CH4 + Cl2
-
CCl4+ HCl is balanced?
A. O CH4 + Cl2 - CC14+ HCI
B.
CH4 + Cl2 - CCl4 + 4HCI
С.
CH4 + 4Cl2 - CCl4 + 4HCI
D
CH4 + 2Cl2 - CCl4 +2HCI

Please answer these. The tables needed for question 7 are in the picture. I got rid of some of the questions that you wouldn’t be able to answer without doing the lesson

Question 1: Electron Notation Example (2 points)

a. Give the electron configuration of vanadium (V), atomic number 23. (0.5 points)

b. Give the noble gas configuration of vanadium (V), atomic number 23. (0.5 points)

c. List the energy levels for the orbital configuration of vanadium (V), atomic number 23. (1 point)

Question 3: Trends on the Periodic Table (2 points)
a. How does the atomic radius change going down and across the periodic table? (0.5 points)

b. How does first ionization energy change going down and across the periodic table? (0.5 points)

c. How does electronegativity change going down and across the periodic table? (0.5 points)

d. How does the radius of a positive and negative ion compare to a neutral atom? (0.5 points)

Question 4: Chemical Bonds (1 point)
Match each chemical bond to its correct description. (1 point)
A. Ionic bond ___ Sharing of electrons
B. Covalent bond ___ Freely moving electrons
C. Metallic bond ___ Transfer of electrons
Question 5: Intermolecular Forces (3 points)

a. Describe the dipole-dipole force. (1 point)

b. Describe hydrogen bonding. (1 point)

c. Describe the Van der Waals forces. (1 point)

Question 6: Intermolecular Forces and You (2 points)
Imagine you need to take a medicine that the doctor has prescribed for you. Explain why scientists who developed that medicine would need to know whether or not the compound in that medicine is polar. How might a polar medicine behave differently within your body than a nonpolar medicine would? Answer in 1 to 2 paragraphs.

Question 7: Energy in Bonds (9 points)
Use these tables for reference for all parts of this question.

This table summarizes the average energies of single bonds between atom pairs in many different compounds.
a. According to Table 2, which is the strongest bond? Which is the weakest bond? Based on what you know about the atomic radii and electronegativity of the elements involved in the bonds, why do you think these two have the most extreme bond-energy values? (3 points)

b. How are the bond energies of each bond listed in Table 2 determined? (1 point)

c. Why do you think there aren't bond energy values given in Table 2 for N–S and S–I? (1 point)

d. Based on Tables 1 and 2, how would you describe the trend in bond strength of single, double, and triple bonds? (1 point)

e. Based on Table 2, how would you describe the trend in the strength of bonds formed by the elements carbon, nitrogen, and oxygen? Would you describe this trend as a periodic trend? Why or why not? (3 points)

Question 8: Causes of Molecular Shape (3 points)
a. What is the VSEPR theory? (1 point)

b. How does electron repulsion determine molecular shape? (1 point)

c. How do lone electron pairs affect molecular shape? (1 point)

Question 10: Lewis Structure (3 points)
a. Draw the Lewis structure for the Se and 2 H atoms. (1 point)

b. Draw the Lewis structure for the SeH2 molecule. (1 point)

c. What shape would SeH2 have? Draw the molecule. (1 point)

Question 11: Ionic and Covalent Compounds (5 points)
Identify each of the following as a covalent compound or ionic compound. Then provide either the formula for compounds identified by name or the name for those identified by formula. (1 point each)
a. Li2O:

b. Dinitrogen trioxide:

c. PCl3:

d. Manganese(III) oxide:

e. Calcium bromide:

Which is an example of an exothermic reaction?

A. the rusting of iron
B. dissolving ammonium chloride in water C. photosynthesis
D. baking bread​

I will give you Brainly if you awsers right pl if your gonna awser for pints just put I don’t know

Which of the below elements will not likely form an ionic bond?
A.
Cs & O
B.
P & O
C.
Ne & Cl
D.
Li & Mg

In the reaction 2AgI + Na2S → Ag2S +2NaI, calculate the number of moles of AgI needed to react with 85.0 g

1. Which of the following substances is believed to be responsible for the hole in the ozone
layer?
A. Ammonia
B. Chlorofluorocarbons (CFCs)
C. Lead
D. Carbon monoxide