PS 5.2 Formative

Each row in the periodic table is called a _____.

Each column on the periodic table is called a _____.

An element's electron configuration determines its chemical properties. Elements in the same group have similar chemical properties. This pattern of repeating properties is called the _____.

• Bohr model

• atomic mass

• periodic law

• atomic mass unit

Simply put, atomic mass is ...

• the weighted average atomic number for all isotopes of an element

• the weighted average mass number for all isotopes of an element

• the sum of mass numbers for all isotopes of an element

• the sum of atomic numbers for all isotopes of an element

The majority of the elements on the periodic table are classified as _____.

• metals

• nonmetals

• metalloids

• gases

_____ are poor conductors of heat and electric current. (element type)

Tags

NGSS.MS-PS3-3

Elements with properties that fall between those of metals and nonmetals are called _____.

• gases

• solutions

• inert

• metalloids

As you move from left to right across a period, element properties become...

• more metallic

• less nonmetallic

• less metallic

• more reactive

• m

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Scientists use atomic mass units (amu) to compare the masses of atoms. An atomic mass unit is equal to

• 1/12th the mass of a carbon-12 atom

• the mass the nucleus of a carbon-12 atom

• the mass of a helium atom

• the atomic number of carbon

Tags

NGSS.MS-PS1-1

In the modern periodic table, elements are arranged by increasing _____.

• atomic mass

• atomic number

• mass number

• density