Subatomic Particles

Front

What are subatomic particles?

Back

Subatomic particles are the particles that make up an atom, including protons, neutrons, and electrons.

Front

Where is the mass of an atom concentrated?

Back

The mass of an atom is concentrated in the nucleus, which contains protons and neutrons.

Front

What is the charge of an electron?

Back

The charge of an electron is negative.

Front

What is the charge of a proton?

Back

The charge of a proton is positive.

Front

How many protons does a neutral atom of chlorine have?

Back

A neutral atom of chlorine has 17 protons.

Front

If an atom has 22 protons and 26 neutrons, what is its atomic number?

Back

The atomic number is 22, which is the number of protons.

Front

What happens to the charge of an atom when it loses an electron?

Back

The atom becomes positively charged when it loses an electron.

Front

How many electrons does a neutral atom of calcium (atomic number 20) have?

Back

A neutral atom of calcium has 20 electrons.

Front

What is an ion?

Back

An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Front

What is a chloride ion (Cl⁻)?

Back

A chloride ion is a negatively charged ion formed when a chlorine atom gains an electron.