Chemistry Test Review (24-25)

Front

What is the atomic number of an atom with 2 protons?

Back

2

Front

Which element is a noble gas?

Back

Helium

Front

What happens when the number of protons in an atom changes?

Back

It changes the atom's identity (name of element).

Front

What is the correct chemical formula for 3 Hydrogen (H), 1 Sulfur (S), and 4 Oxygen (O)?

Back

H₃SO₄

Front

What does a neutral atom of magnesium-26 consist of?

Back

12 protons, 14 neutrons, 12 electrons.

Front

Define atomic number.

Back

The number of protons in the nucleus of an atom.

Front

What is a neutron?

Back

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

Front

What is the difference between an atom and an ion?

Back

An atom is neutral, while an ion has a net charge due to the loss or gain of electrons.

Front

What is the significance of the periodic table?

Back

It organizes elements based on their atomic number and properties.

Front

What is a chemical formula?

Back

A representation of a substance using symbols for its constituent elements.