MOD Chemical Formulas and Atomic Structure Test

Front

What is the mass number of an atom?

Back

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

Front

How do you calculate the mass number of an atom?

Back

Add the number of protons and neutrons.

Front

What is the total number of atoms in H₂SO₄?

Back

There are 7 atoms in total: 2 Hydrogen, 1 Sulfur, and 4 Oxygen.

Front

How many Hydrogen atoms are in 4H₂O?

Back

There are 8 Hydrogen atoms (4 x 2 = 8).

Front

How many protons are in an atom of chlorine?

Back

An atom of chlorine has 17 protons.

Front

What does Na₂CO₃ represent in terms of sodium atoms?

Back

Na₂CO₃ contains 2 sodium (Na) atoms.

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What are protons?

Back

Protons are positively charged particles found in the nucleus of an atom.

Front

What are neutrons?

Back

Neutrons are neutral particles found in the nucleus of an atom.

Front

What are electrons?

Back

Electrons are negatively charged particles that orbit the nucleus of an atom.