Which of these is a physical change

How many electrons does a cobalt atom have?

How many electrons does a Tin⁴⁺ ion have?

What is the average atomic mass of tungsten

What is the missing particle for the following equation:

What is the red part of the periodic table on the far left called?

What is the symbol for gold on the periodic table?

Which of these is a pure substance

The molecule glucose ( $C_6H_{12}O_6$ ) is a type of sugar. What is the ratio of carbon atoms to hydrogen atoms in this molecule?

What kind of alloy is pictured here?

An element shown in blue is a

What is the correct way to write a compound that contains the following ions: $Ca^{2+}$   and  $PO_4^{3-}$  

In 100 grams of silver chloride, there are 75.3 grams of silver and 24.7 grams of chlorine. How many grams of chlorine are there in 200 grams of silver chloride?

Which ion is sulfate?

How many grams are in one mole of nitrogen gas ( $N_2$ )? 

If 1 inch = 2.54 cm, how many inches = 7.62 cm?

Which of the three standard states of matter has the least motion of its particles

When we go from a solid to a liquid, it's called

When a substance goes from gas to solid, it's called

Point A is called the

Point B is called the

In this diagram, what color is the solid phase?

In this diagram, what is represented by the shortest line?

Which substance would you expect to have the highest specific heat?

If you were to balance this chemical reaction, what is the number in front of the hydrogen? $N_2+H_2\rightarrow NH_3$  

When you form cloudiness in the test tube, what kind of chemical reaction is that?

Is this molecule polar or nonpolar

Is this molecule polar or nonpolar

This is why water forms droplets

This is why water forms a meniscus

What is depicted in the image?

Which molecule has the highest intermolecular forces (IMFs)?

What do we call the process of using boiling point to separate substances?

These molecules release H⁺ ions in solution.

These molecules release OH^- ions in solution.

Which of these molecules is diprotic?

What does pH measure?

A chemical which changes colors in different pH conditions is called a/an

A cheeseburger is an example of a

What isn't needed for an explosion?

Which of these molecules is not explosive?

Which of these is a copper solution?

What is your favorite thing in the world?

Which class will you miss the most?

Which age is closest to yours?