Counting Atoms Worksheet

Counting Atoms Worksheet

7th Grade

25 Qs

quiz-placeholder

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Counting Atoms Worksheet

Counting Atoms Worksheet

Assessment

Quiz

Science

7th Grade

Practice Problem

Medium

NGSS
MS-PS1-1

Standards-aligned

Created by

John-Derrick Capistrano

Used 7+ times

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25 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

1. Chemical formulas can have three components. a) The ____________ which are represented by a single uppercase letter, or represented by an uppercase letter followed by a lowercase letter. This tells you the types of elements in the compound.

element symbols

chemical bonds

atomic numbers

molecular weights

Answer explanation

Tags

NGSS.MS-PS1-1

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Chemical formulas can have three components. The ____________ which are numbers that are found on the lower ________________ - hand side of each element symbol. This tells you the number of ____________ of this element in the molecule. If an element symbol has no subscript next to it, then this indicates that there is only ____________ atom of this element in the molecule.

subscripts, right, atoms, one

coefficients, left, molecules, two

prefixes, upper, ions, three

indices, center, electrons, four

Tags

NGSS.MS-PS1-1

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The ____________ which surround some groups of atoms indicate that the numbers of all of the atoms inside the bracket need to be ____________ by the ____________ on the outside of the bracket found on the lower ________________ - hand side of that bracket.

brackets, multiplied, subscript, right

parentheses, divided, superscript, left

braces, added, coefficient, upper

quotes, subtracted, exponent, middle

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Record the number of each atom in each molecule, then record the total number of atoms in the molecule: 1) NaOH

Na: 1, O: 1, H: 1, Total: 3

Na: 2, O: 1, H: 1, Total: 4

Na: 1, O: 2, H: 1, Total: 4

Na: 1, O: 1, H: 2, Total: 4

Tags

NGSS.MS-PS1-1

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Record the number of each atom in each molecule, then record the total number of atoms in the molecule: 2) HNO₃ Element | # of Atoms ________ | __________ ________ | __________ ________ | __________ Total: __________

H: 1, N: 1, O: 3, Total: 5

H: 2, N: 1, O: 2, Total: 5

H: 1, N: 2, O: 3, Total: 6

H: 1, N: 1, O: 2, Total: 4

Tags

NGSS.MS-PS1-1

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Record the number of each atom in each molecule, then record the total number of atoms in the molecule: 3) Li₂O Element | # of Atoms ________ | __________ ________ | __________ Total: __________

Li: 2, O: 1, Total: 3

Li: 1, O: 2, Total: 3

Li: 2, O: 2, Total: 4

Li: 1, O: 1, Total: 2

Tags

NGSS.MS-PS1-1

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Record the number of each atom in each molecule, then record the total number of atoms in the molecule: 4) Li₂SO₄ Element | # of Atoms ________ | __________ ________ | __________ ________ | __________ Total: __________

Li: 2, S: 1, O: 4, Total: 7

Li: 1, S: 2, O: 4, Total: 7

Li: 2, S: 1, O: 2, Total: 5

Li: 2, S: 2, O: 4, Total: 8

Tags

NGSS.MS-PS1-1

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