Chemistry First Semester Final Practice Test - Period 5

Front

What determines the chemical properties of an element?

Back

The arrangement of outer electrons.

Front

How many grams are in 32 kg?

Back

32,000 g.

Front

What is the charge of a proton?

Back

+1.

Front

Which of the following best describes the relationship between protons and an element's position on the periodic table?

Back

Elements are ordered horizontally by their number of protons.

Front

What does the atomic number of an element represent?

Back

It equals the number of protons.

Front

What is the definition of an element?

Back

A substance that cannot be broken down into simpler substances and is made of atoms with the same number of protons.

Front

What is the difference between atomic mass and atomic number?

Back

Atomic mass is the weighted average mass of an element's isotopes, while atomic number is the number of protons in the nucleus.

Front

What is a neutron?

Back

A subatomic particle found in the nucleus of an atom, with no charge.

Front

What is the significance of the periodic table?

Back

It organizes elements based on their atomic number, electron configuration, and recurring chemical properties.

Front

What is an isotope?

Back

Atoms of the same element that have the same number of protons but different numbers of neutrons.