6th Gr. - Big Idea 5 - Unit Review

Protons and neutrons are about the same size.

• True
• False

Protons and neutrons are located in an atom's _____________________ .

• isotope
• nucleus
• orbitals

Electrons are found in the _______________ of an atom.

• isotope
• nucleus
• orbitals

An atom always has exactly the same number of _________________ as protons.

• electrons
• isotopes
• neutrons

Which conditions have to be present for an atom of an element to be considered an isotope?

• The number of protons, neutrons, and electrons must be the same.
• The number of protons, neutrons, and electrons must all be different.
• The number of neutrons must be exactly equal to the number of electrons.
• The number of neutrons must be greater than the number of protons.

Elements on the periodic table are arranged in groups because they _______________________________________ .

• have the same number of atomic shells
• have the same number of electrons in their outer shells

Most of the elements on the periodic table are classified as _____________________ and a located on the _______________ side of the table.

• metals; left
• metals; right
• nonmetals; left
• nonmetals; right

The element hydrogen is in the "wrong place on the periodic table. This is because ______________________ .

• it is a metal that has been grouped with nonmetals
• it is a nonmetal that has been grouped with metals

To find the number of neutrons in an atom of an element, subtract the ________________________ from the ____________________________ .

• group; period
• atomic number; atomic weight
• number of outer shell electrons; number of atomic shells
• atomic weight; atomic number

Why is hydrogen arranged where it is in the periodic table.

• It has the same number of atomic shells as helium.
• It has the same number of electrons in its outer shell as the other elements in its group.
• It has the same number of electrons in its outer shell as the other elements in its period.