Properties, Changes, and Periodic Table Review

Question 1

The number at the top of the square is the...

Accepted Answer

atomic number

Question 2

Fluorine-19 has how many protons?

Accepted Answer

9

Question 3

Ice cream absorbs the heat from the air around it and begins to melt. This is called a(n)

Accepted Answer

endothermic change

Question 4

Fireworks exploding on the 4th of July is an example of a ...

Accepted Answer

chemical change

Question 5

The number at the bottom of the square is the...

Accepted Answer

average atomic mass (atomic weight)

Question 6

Which of the following is a chemical change shown in the picture?

Accepted Answer

the candles are burning

Question 7

Each of the following is a physical property of nonmetals EXCEPT...

Accepted Answer

shiny

Question 8

Sodium (alkali metal) is more reactive than iron (transition metal).

Accepted Answer

True

Question 9

Each of the following is a physical property of metals EXCEPT...

Accepted Answer

brittle

Question 10

Which one is false?

Accepted Answer

none are true

Question 11

Iron-56 has how many neutrons?

Accepted Answer

30

Question 12

If bubbles form when two substances react, what is DEFINITELY one of the products of the reaction?

Accepted Answer

gas

Question 13

As sugar burns, it releases a lot of energy as heat. This is called a(n) __________ reaction.

Accepted Answer

exothermic

Question 14

The atomic number of an atom is determined by the number of

Accepted Answer

protons

Question 15

Iron's mass number is...

Accepted Answer

56

Question 16

When two liquids react in a precipitate reaction, they produce a...

Accepted Answer

solid

Question 17

Which of the following does NOT happen during a chemical reaction?

Accepted Answer

a physical change

Question 18

The mass number can be calculated by all of the following EXCEPT...

Accepted Answer

protons + neutrons + electrons

Question 19

Which of the following is a physical property that describes the picture?

Accepted Answer

the cake has polka dots

Question 20

Which of the following elements is NOT reactive?

Accepted Answer

neon

Questions 20