Front

Elements in the same ________ have the most similar chemical reactivity.

Back

Family

Front

How many protons does an atom of Calcium have?

Back

20

Front

The mass of the atom is determined by the ______ and ______.

Back

Protons and Neutrons

Front

Atoms of different elements have ________ number of protons.

Back

different

Front

What classification of element is Bromine?

Back

Nonmetal

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What are the three main categories of elements in the periodic table?

Back

Metals, Nonmetals, and Metalloids.

Front

What is the significance of the periodic table's arrangement?

Back

Elements are arranged by increasing atomic number and similar properties.

Front

What is a chemical symbol?

Back

A one or two-letter abbreviation for an element.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of one type of atom, while a compound is made of two or more different types of atoms chemically bonded.