Unit 2 Chemistry

All of the elements in the same ROW are in the same

• Period

• Group

• Column

• Compound

If atoms are in the same group they have the same number of________________

• Compound

• Period

• Valence Electrons

• Protons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The _________________ states that an atom will lose or gain electrons to have a full shell.

• Compound

• Homogeneous Mixture

• Valence Electrons

• Octet Rule

A ____________________ is one or more elements chemically combined.

• Compound

• Element

• Homogeneous Mixture

• Heterogeneous Mixture

Tags

NGSS.MS-PS1-1

A ____________________ is the same throughout.

• Heterogeneous Mixture

• Compound

• Homogeneous Mixture

6.02 x 1023 atoms is known as

• Avogadro's Constant

• period

• Group

The simplest Form of matter that has a unique set of properties.

• Compound

• Element

• Homogeneous Mixture

• Heterogeneous Mixture

Which of the following was NOT part of Dalton’s Atomic Theory?

• All matter is made of atoms

• All atoms of a given element are identical

• The atoms of one element are different from atoms of another element.

• When atoms combine in a chemical reaction they rearrange into other elements.

• In chemical reactions atoms are separated,combined, or rearranged. (but cannot be destroyed)

A nucleus is composed of _________ and _____________.

• Neutrons and Electrons

• Protons and Electrons

• Neutrons and Protons

• Positrons and Orbs

Tags

NGSS.MS-PS1-1

The nucleus has a ___________charge. It is very _____________ and very ___________________.

• Negative, large, spread out

• Negative, small, dense

• Positive, large, dense

• Positive, small, dense