Chemical Formula Review

Chemical Formula Review

Assessment

Flashcard

Science

8th Grade

Hard

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15 questions

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1.

FLASHCARD QUESTION

Front

What is a chemical formula?

Back

A chemical formula is a way of expressing the composition of a substance using symbols for its constituent elements and numbers to indicate the ratio of atoms.

2.

FLASHCARD QUESTION

Front

What does the subscript in a chemical formula indicate?

Back

The subscript indicates the number of atoms of the element in the molecule. For example, in H2O, the '2' indicates there are two hydrogen atoms.

3.

FLASHCARD QUESTION

Front

What is the total atom count in the formula 2H2O?

Back

6 (2 Hydrogen + 1 Oxygen = 3 atoms per molecule, and there are 2 molecules: 3 x 2 = 6).

4.

FLASHCARD QUESTION

Front

True or False: A molecule can consist of two or more different elements.

Back

True.

5.

FLASHCARD QUESTION

Front

What elements are present in the compound C6H12O6?

Back

Carbon, Hydrogen, Oxygen.

6.

FLASHCARD QUESTION

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

7.

FLASHCARD QUESTION

Front

What does the formula NaCl represent?

Back

Sodium Chloride, which is table salt, consisting of sodium and chlorine.

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