Periodic Table and Trends

In the modern periodic table elements are arranged by:

• atomic mass
• atomic number
• valence electrons
• number of isotopes

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

An element's identity is determined by the number of

• electrons.
• protons.
• neutrons.
• valence.

The atomic number of an element tells the number of _____ in the nucleus of an atom of that element.

• protons
• neutrons
• electrons
• isotopes

An element is made up of only one kind of _____.

• isotope
• plastic
• atom
• metal

Rutherford's experiment showed that most of an atom is made up of _____.

• a nucleus
• an electron cloud
• empty space
• alpha particles

Each row in the periodic table is called

• group
• family
• period
• column 

Each column in the periodic table is called a 

• period
• group/family
• cluster
• unit

Elements which are shiny, conduct electricity and heat are called

• metal
• nonmetal
• metalloid
• nonexistent

Tags

NGSS.MS-PS2-3

The atoms along the staircase are called 

• metals
• nonmetals
• metalloids
• noble gases

Tags

NGSS.MS-PS1-1

How many Valance electrons does Iodine Have?

• 6
• 16
• 7
• 17

Tags

NGSS.HS-PS1-1