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Science

8th Grade

NGSS covered

Used 4+ times

Counting Atoms
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23 questions

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1.

DRAG AND DROP QUESTION

5 mins • 1 pt

What does the subscript in a chemical formula tell you? (a)  

How many molecules are present
How many atoms are present
How many elements are present
How many neutrons are present

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Molecules that are made of more than one type of atom are called?

Molecules

Elements

Mixtures

Compounds

Tags

NGSS.MS-PS1-1

3.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

A subscript is the small number below a(n) ________ that tells the number of _______ of that element.

element symbol; atoms
atom; element symbol
subscript; protons
compound; elements

Tags

NGSS.MS-PS1-1

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of the following is a compound?

Co
O2
C
CO2

Tags

NGSS.MS-PS1-1

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

How many Hydrogen atoms are in 4H2O?

6

8

2

4

Tags

NGSS.MS-PS1-1

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

How many Magnesium atoms are in 10MgCl2?

10

5

20

Tags

NGSS.MS-PS1-1

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

How many Aluminum atoms are in Al2O3?

3

2

5

1

Tags

NGSS.MS-PS1-1

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