Question

Which of these are families of elements?

A.
metals and noble gases

B.
shells and nonmetals

C.
properties and rare earth elements

D.
metalloids and atoms

Answer 1

@Emo<3girl

Answer 2

c

Answer 3

C

Answer 4

Why is the atomic mass of many elements not a whole number?

A.
Elements are unstable.

B.
An element may have isotopes with different numbers of neutrons.

C.
The atomic mass includes all the electrons.

D.
Isotopes are always expressed in decimals.

Answer 5

@amistre64

Answer 6

B

Answer 7

thx

Answer 8

NP bro