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 information about the proportions of atoms that constitute a particular chemical compound or molecule.

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 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 a substance formed when two or more different types of atoms bond together.

4.

FLASHCARD QUESTION

Front

How do you determine the total number of atoms in a chemical formula?

Back

To find the total number of atoms, add up all the atoms represented in the formula, considering the subscripts. For example, in 2NH3, there are 2 Nitrogen and 6 Hydrogen atoms, totaling 8.

5.

FLASHCARD QUESTION

Front

What elements are present in the compound NaCl?

Back

Sodium (Na) and Chlorine (Cl).

6.

FLASHCARD QUESTION

Front

What is the chemical formula for water?

Back

H2O.

7.

FLASHCARD QUESTION

Front

What does a pH level of 0.8 indicate about a substance?

Back

A pH level of 0.8 indicates that the substance is highly acidic.

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