Chemistry Review 8th grade NC

Question 1

Can we create matter in the chemistry lab?

Accepted Answer

no

Question 2

SnCl2 + 2FeCl3 ----------> 2FeCl2 + SnCl4 How many atoms of Cl are in the products?

Accepted Answer

8

Question 3

Noble gases are in group _____ on the periodic table.

Accepted Answer

18

Question 4

Who created the modern periodic table?

Accepted Answer

Mendeleev

Question 5

The small lower numbers in a written chemical reaction are called

Accepted Answer

subscripts

Question 6

How many atoms of Hydrogen are in 3H2SO4 ?

Accepted Answer

6

Question 7

What does ductile mean?

Accepted Answer

can be pulled into a wire

Question 8

Horizontal rows on the periodic table are called _______________?

Accepted Answer

periods

Question 9

When an experiment is done in a way that nothing can escape, it is called

Accepted Answer

closed system

Question 10

2Na + Cl2 ------> ____NaCl What number should go in the blank to balance the equation?

Accepted Answer

2

Question 11

Where are metalloids on the periodic table?

Accepted Answer

On the stair step line

Question 12

Which of these is a chemical reaction?

Accepted Answer

rusting

Question 13

The large numbers in front of molecules in a written chemical reaction are called

Accepted Answer

coefficiencts

Question 14

Substances that go into a chemical reaction are called the ____________.

Accepted Answer

reactants

Question 15

Alkali metals are in group _______ on the periodic table.

Accepted Answer

1

Question 16

What element is very important to the function of electronic devices

Accepted Answer

silicon

Question 17

Vertical (up and down) columns on the periodic table are called?

Accepted Answer

either groups or families

Question 18

What is your favorite 8th grade class?

Accepted Answer

Science

Question 19

What does malleable mean?

Accepted Answer

Can be bent

Question 20

When the products of a reaction weigh less than the reactants _________ was probably lost.

Accepted Answer

gas

Question 21

Which of the following is NOT evidence of a chemical reaction?

Accepted Answer

melting

Question 22

What is the most important evidence of a chemical reaction?

Accepted Answer

New substance formed

Question 23

Which of these is a NOT chemical reaction?

Accepted Answer

melting

Question 24

Halogens are in group ____ on the periodic table

Accepted Answer

17

Question 25

The periodic table is arranged by

Accepted Answer

atomic number

Question 26

Metals are to the ______________ of the stair step line

Accepted Answer

left

Question 27

The elements in a group have the same ____________

Accepted Answer

properties

Question 28

_______________ __________ will not react

Accepted Answer

noble gases

Chemistry Review 8th grade NC

Questions 28

Chemistry Review 8th grade NC

Questions 28