Atomic Structure Ions Isotopes

What is a Lewis Dot Structure?

• It shows all of the particles in the atom.

• Contains protons and neutrons

• Only shows the element symbol and it's outer most electron shell

• Contains protons and electrons

What is the the outermost shell with electrons?

• Shells

• Isotope

• Orbit

• Valence

What do we call many atoms of the same type; has unique properties such as melting and boiling points?

• Atoms

• Elements

• Isotope

• Ions

An atom with the same atomic number but a different mass number is called

• an ion

• an isotope

• an element

How many neutrons are in Lithium-7?

• 4

• 3

• 7

• 5

Tags

NGSS.MS-PS1-1

In Bohr's model of the atom, where are the electrons located?

• in the center of the atom

• in energy levels outside the nucleus

• spread throughout the atom, like a chocolate chip cookie

Why is an atom considered electrically neutral?

• The number of protons equals the atomic number.

• The number of electrons equals the number of neutrons.

• The number of protons is the same as the number of electrons.

• The number of electrons equals the number of protons.

A subatomic particle with a neutral charge is called

• a proton

• an isotope

• an electron

• a neutron

__________ determine the chemical reactivity of an atom.

• Protons

• Electrons

• Isotopes

• Neutrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

If you change the number of neutrons, you change the __________.

• charge

• mass

• identity