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Elements, compounds and Mixtures (REVIEW)

Elements, compounds and Mixtures (REVIEW)

Assessment

Flashcard

Chemistry

8th 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 an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. It consists of only one type of atom.

2.

FLASHCARD QUESTION

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together. For example, water (H2O) is a compound made of hydrogen and oxygen.

3.

FLASHCARD QUESTION

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically combined. Each substance retains its own properties.

4.

FLASHCARD QUESTION

Front

What are atoms?

Back

Atoms are the smallest units of matter that make up all substances. They consist of protons, neutrons, and electrons.

5.

FLASHCARD QUESTION

Front

What are the blue numbers in a chemical formula called?

Back

The blue numbers are called subscripts, which indicate the number of atoms of each element in a compound.

6.

FLASHCARD QUESTION

Front

What is the chemical formula for salt?

Back

The chemical formula for salt is NaCl, which indicates it is a compound made of sodium (Na) and chlorine (Cl).

7.

FLASHCARD QUESTION

Front

What is the difference between a compound and a mixture?

Back

A compound is a substance formed from two or more elements that are chemically bonded, while a mixture is a combination of substances that are not chemically bonded.

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