Atoms

The _____ is based on the number of protons in the nucleus of the atom.

• atomic structure

• periodic table of the elements

• atomic number

• atomic mass

What subatomic particle is represented by this symbol (+):

• neutron

• proton

• electron

What subatomic particle is represented by this charge (-):

• neutron

• proton

• electron

Why do the electrons surround the nucleus?

• the negative electrons are attracted to the neutral neutrons

• the negative electrons are repelled by the neutral neutrons

• the negative electrons are attracted to the positive protons

• the negative electrons are repelled by the positive protons

Tags

NGSS.MS-PS1-1

Classification system for elements is called:

• Elements

• Periods

• The Periodic Table of Elements

• Families

The smallest unit of an element that maintains the properties of that element is known as--

• a proton

• a neutron

• an element

• an atom

An atom's central region, which is made up of protons and neutrons is called--

• Electron Cloud

• Nucleolus

• Nucleus

• Atomic Number

Which subatomic particle(s) are found in the nucleus of the atom? Choose all that apply.

• proton

• neutron

• electron

How many electrons does Copper (Cu) have?

• 29

• 64

• 35

• 58

Tags

NGSS.MS-PS1-1

The number of protons in the nucleus of an atom is called the --

• atom

• proton

• atomic mass number

• atomic number