Elements and Compounds Flashcard

Elements and Compounds Flashcard

Assessment

Flashcard

Science

7th Grade

Practice Problem

Hard

Created by

Wayground Content

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7 questions

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1.

FLASHCARD QUESTION

Front

The smallest unit of matter that retains the chemical identity of the elements

Back

Atom

2.

FLASHCARD QUESTION

Front

A pure substance made of one kind of atom that cannot be broken down chemically into simpler substances.

Back

Element

3.

FLASHCARD QUESTION

Front

A pure substance made by chemically combining two or more elements; represented by a chemical formula.

Back

Compound

4.

FLASHCARD QUESTION

Front

The simplest unit (particle) of a compound that can exist; formed when two or more atoms combine chemically.

Back

Molecule

5.

FLASHCARD QUESTION

Front

Oxygen forms molecules made of two atoms, O2. Carbon and oxygen form molecules made of one carbon atom and two oxygen atoms, CO2. Which of the statements below is true?

Back

O2 is a molecule while CO2 is a compound.

6.

FLASHCARD QUESTION

Front

What chemical symbol is common in the formulas of aluminum hydroxide (AlOH₃), potassium hydroxide (KOH), and sodium hydroxide (NaOH)?

Back

O

7.

FLASHCARD QUESTION

Front

Compare the two chemical formulas CO and CO2. What is a similarity between them?

Back

They both represent one molecule

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