Which two groups of elements in the periodic table are the most reactive?(1 point)

The two groups of elements in the periodic table that are the most reactive are **alkali metals and halogens**.

se the periodic table to answer the question.

An illustration shows the periodic table.

Which element has the same number of electron shells as tungsten (W)?

(1 point)
Responses

nickel (Ni)
nickel (Ni)

gold (Au)
gold (Au)

yttrium (Y)
yttrium (Y)

molybdenum (Mo)

Tungsten (W) is in period 6 of the periodic table, which means it has 6 electron shells. The element that has the same number of electron shells as tungsten is **gold (Au)**, which is also in period 6.

Use the periodic table to answer the question.

An illustration shows the periodic table.

Which element is a noble gas?

(1 point)
Responses

rubidium (Rb)
rubidium (Rb)

fluorine (F)
fluorine (F)

hydrogen (H)
hydrogen (H)

radon (Rn)

The element that is a noble gas is **radon (Rn)**.

Use the periodic table to answer the question.

An illustration shows the periodic table.

Which statement about nitrogen (N) and phosphorus (P) is correct?

(1 point)
Responses

They have the same number of valence electrons.
They have the same number of valence electrons.

They are both inert.
They are both inert.

They are both classified as halogens.
They are both classified as halogens.

They have the same number of electron shells.

The correct statement about nitrogen (N) and phosphorus (P) is: **They have the same number of valence electrons.** Both nitrogen and phosphorus are in Group 15 (or Group V) of the periodic table and have five valence electrons.