8th Grade Check-In

the smallest particle of matter

• atom
• element
• molecule
• compound

An electron is in a region outside the nucleus. An electron

• is larger than a proton and has no charge

• has less mass than a proton and has a negative charge

• is smaller than a proton and has no charge

• has a positive charge

Tags

NGSS.MS-PS1-1

Neutrons are located in the nucleus of the atom. A neutron has

• no charge

• a positive charge

• a negative charge

• a positive and a negative charge

Tags

NGSS.MS-PS1-1

Protons are located in the nucleus of the atom. A proton has

• no charge

• a positive charge

• a negative charge

• a positive and a negative charge

Tags

NGSS.MS-PS1-1

True or False: Neutrons and electrons are attracted to one another.

• True

• False

A hydrogen atom is made up of one proton and one electron. The proton and electron stay near each other because

• positive and negative charges repel

• positive and positive charges repel

• positive and negative charges attract

• two negatives make a positive

An element and an atom are different but related because

• A particular element is made up of many different types of atoms

• A molecule is the same as an atom

• An element is made up of all the same type of atom

• An element is smaller than an atom

Electrons are in regions around the nucleus called energy levels. The first energy level

• Is furthest from the nucleus

• is closest to the nucleus

• holds the most electrons

• needs more than two electrons to fill it up

The atoms in a column (group) of the periodic table all have

• The same abbreviation

• The same number of energy levels

• The same number of electrons

• The same number of electrons in the outer energy level

In the process of covalent bonding, atoms share electrons. This means that

• Electrons from each atom are attracted to the nucleus of both atoms

• Protons and neutrons attract

• Atoms lose electrons and become ions

• Atoms gain electrons and become ions

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5