Lesson 2 Flashcard Review

Lesson 2 Flashcard Review

Assessment

Flashcard

Science

7th Grade

Practice Problem

Hard

Created by

Wayground Content

FREE Resource

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15 questions

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1.

FLASHCARD QUESTION

Front

What is a subscript in a chemical formula?

Back

A subscript is a small number below the chemical symbol that indicates the number of atoms of that element in a molecule.

2.

FLASHCARD QUESTION

Front

How many atoms of Hydrogen are in H₂O?

Back

There are 2 atoms of Hydrogen in H₂O.

3.

FLASHCARD QUESTION

Front

What does the chemical formula CF₂Cl₂ represent in terms of atom count?

Back

C = 1, F = 2, Cl = 2.

4.

FLASHCARD QUESTION

Front

How many atoms of each element are in C₃H₅NO₃?

Back

C = 3, H = 5, N = 1, O = 3.

5.

FLASHCARD QUESTION

Front

Which of the following is NOT a molecule: CO₂, C, OH₂, P₂K₃?

Back

C is NOT a molecule.

6.

FLASHCARD QUESTION

Front

What does the chemical formula H₂O tell us about the composition of water?

Back

H₂O consists of 2 Hydrogen atoms and 1 Oxygen atom.

7.

FLASHCARD QUESTION

Front

Define a molecule.

Back

A molecule is a group of two or more atoms bonded together.

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