Features of atoms

What are atoms primarily made of?

Atoms are primarily made of _____, _____ and _______

protons, neutrons, electrons

Fill in the blank: The smallest unit of matter is __.

atom

Define an atom.

basic unit of chemical element

What is the charge of a proton?

A proton has a positive charge.

Fill in the blank: The neutral particle in an atom's nucleus is called a __.

neutron

What is the main difference between protons and neutrons?

protons = positive charge, neutrons = no charge

Fill in the blank: Electrons have a __ charge.

negative

What determines the atomic number of an element?

number of protons in nucleus

Fill in the blank: The mass of an atom is mainly concentrated in the __.

nucleus

Name the three primary subatomic particles.

Protons, neutrons, and electrons

Fill in the blank: Atoms are typically electrically neutral because they have equal numbers of _____ and _____.

protons, neutrons

Fill in the blank: The number of protons in the nucleus of an atom is called its ____ ____.

atomic number

Fill in the blank: The basic building blocks of matter are _____.

atoms

Fill in the blank: The nucleus of an atom contains _____ and _____.

protons, neutrons

What particle is primarily responsible for the chemical properties of an atom?

electrons

Fill in the blank: The centre of an atom is called the ____.

nucleus