In the modern periodic table elements are arranged by:

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

Each column(up&down) in the periodic table is called a 

• period
• group
• cluster
• unit

The periodic table has __ periods.

• 18
• 8
• 2
• 7

The majority of elements on the periodic table are

• man made.
• nonmetals.
• metals.
• gases.

What scientist is known as the "Father of the Modern Periodic Table"?

• Johann Dobereiner
• John Newlands
• Demitri Mendeleev
• Henry Mosely

Which periodic group has the smallest atomic radius?

• Alkali metals
• Halogens
• Noble Gases
• Transition metals

Atomic radius generally increases as we move __________.  

• down a group and from right to left across a period 
• up a group and from left to right across a period 
• down a group and from left to right across a period 
• up a group and from right to left across a period 

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NGSS.HS-PS1-1

Which is needed to remove an electron?

• Ion
• electron affinity
• electronegativity
• ionization energy

Electronegativity is...

• how good an atom is at attracting electrons
• the ability of an atom to lose electrons
• the energy required to remove an electron from a specific atom
• how easy it is to make friends. 

Tags

NGSS.HS-PS1-1

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Ionization energy is...

• the energy required to add an electron to a specific atom
• how much energy it takes to remove an electron from an atom
• the energy required to shield the outer electrons from the nucleus
• a measure of the ability of an atom to attract electrons

Tags

NGSS.HS-PS1-2

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