Atomic Structure Test

Front

What is an isotope?

Back

An isotope is a variant of a chemical element that has the same number of protons but a different number of neutrons.

Front

What determines the charge of an ion?

Back

The charge of an ion is determined by the difference between the number of protons (positive charge) and electrons (negative charge).

Front

How many protons are in a gold atom?

Back

Gold has 79 protons.

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

How do you find the number of neutrons in an atom?

Back

The number of neutrons can be found by subtracting the atomic number from the atomic mass.

Front

What is a neutral atom?

Back

A neutral atom has an equal number of protons and electrons, resulting in no overall charge.

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in the nucleus of an atom.

Front

How many electrons does a neutral oxygen atom have?

Back

A neutral oxygen atom has 8 electrons.

Front

What is the relationship between atomic number and electrons in a neutral atom?

Back

In a neutral atom, the number of electrons is equal to the atomic number.

Front

What is a +2 ion?

Back

A +2 ion is an atom that has lost two electrons, resulting in a positive charge.