CFAa

CFAa

Assessment

Flashcard

Science

KG

Hard

Created by

Wayground Content

FREE Resource

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15 questions

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1.

FLASHCARD QUESTION

Front

What is the chemical formula for water?

Back

H₂O

2.

FLASHCARD QUESTION

Front

What do 2H₂ + O₂ → 2H₂O represent?

Back

A chemical reaction where 2 molecules of hydrogen gas combine with 1 molecule of oxygen gas to form 2 molecules of water.

3.

FLASHCARD QUESTION

Front

How many molecules are in 2H₂O?

Back

2

4.

FLASHCARD QUESTION

Front

What is a molecule?

Back

A molecule is a group of atoms bonded together.

5.

FLASHCARD QUESTION

Front

What is the process of combining hydrogen and oxygen to make water called?

Back

A chemical reaction.

6.

FLASHCARD QUESTION

Front

What is the ratio of hydrogen to oxygen in the formation of water?

Back

2:1

7.

FLASHCARD QUESTION

Front

How many total atoms are in one molecule of water (H₂O)?

Back

3 atoms (2 hydrogen and 1 oxygen).

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