Atomic Structure & periodic table

How many elements had scientist discovered by the 1700's?

• 58

• 13

• 63

• 8

The equation that tells you the maximum electrons in an energy level is 2n². (True or False)

• True

• False

How many electrons does the “d” orbital hold?

• 5

• 18

• 10

• 32

A photon is a discrete bundle of electromagnetic energy. (True or False)

• True

• False

Tags

NGSS.HS-PS4-3

Of these elements Br, Cu, Mg, and Ca which is a non-metal?

• Ca

• Mg

• Cl

• Br

Elements that are characterized by their “D” orbitals are called...

• Alkaline Earth Metals

• nonmetals

• Alkali

• Transition metals

Group 2a Elements are called?

• Alkaline Earth Metals

• Alkali metals

• nonmetals

• Transition metals

Which Group of elements that are non-reactive with other elements?

• Non-metals

• Alkali metals

• Halogens

• Noble gases

How did Mendeleev set up the periodic table?

• atomic number

• atomic mass and similarities

• By similarities and groups

• by traits

The ability of an atom to attract electrons when the atom is in a compound

• Energy

• Electronegativity

• Wave energy

• Ionization energy