Review S1

Front

Who is credited with the discovery of the electron?

Back

J.J. Thomson is credited with the discovery of the electron in 1897.

Front

What is the main component of the nucleus of an atom?

Back

The nucleus of an atom is primarily composed of protons and neutrons.

Front

Which element is represented by the symbol 'O' on the periodic table?

Back

The symbol 'O' represents the element Oxygen.

Front

What is a vertical column in the periodic table called?

Back

A vertical column in the periodic table is called a group.

Front

What is the first step in balancing a chemical equation?

Back

The first step in balancing a chemical equation is to identify the reactants and products.

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 is an electron?

Back

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

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.

Front

What is a chemical formula?

Back

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