Basic Atomic Structure

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

What particle has a neutral charge?

Back

The neutron has a neutral charge (0).

Front

Which particle affects the charge of an atom but has little effect on its mass?

Back

The electron affects the charge of an atom but has a negligible mass compared to protons and neutrons.

Front

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

Back

Number of neutrons = Mass number - Atomic number.

Front

What is the atomic number of an element?

Back

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

Front

What is the mass number of silicon with 14 protons and 15 neutrons?

Back

The mass number is 29 (14 protons + 15 neutrons).

Front

What is the charge of a proton?

Back

A proton has a positive charge (+1).

Front

What is the charge of an electron?

Back

An electron has a negative charge (-1).

Front

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

Back

In a neutral atom, the number of protons equals the number of electrons.

Front

What is the significance of the mass number in identifying isotopes?

Back

Isotopes are variants of the same element that have the same number of protons but different numbers of neutrons, resulting in different mass numbers.