Question

What determines the atomic number of an atom?

A.
the number of neutrons in two atoms of an element

B.
the number of electrons in the outer layer of any atom

C.
the number of protons in every atom of an element

D.
the number of protons plus the number of neutrons in an atom

Answer 1

@paki and @Loser66

Answer 2

.the number of protons in every atom of an element

Answer 3

can youhelp with some more @callielovesyhuu

Answer 4

yes please medal tho @Julianne6th

Answer 5

How do scientists determine the number of neutrons in an isotope of an atom?

A.
They find the number of protons.

B.
They divide the atomic mass by two.

C.
They add the number of electrons and protons.

D.
They subtract the atomic number from the atomic mass.

Answer 6

@callielovesyhuu

Answer 7

D.

The Atomic number represents the number of protons and electrons in an element, and the atomic mass represents the number of protons added to the number to the neutrons. Therefore if you have the atomic mass and atomic number of an element you can find the amount of neutrons in an element.

Answer 8

When scientists look at these examples, what do they know about the atoms?
Carbon–12 Carbon–14

A.
The number of neutrons in each atom is not the same.

B.
The atoms have different properties.

C.
One atom has more protons than the other.

D.
Only one of the examples is an isotope.

Answer 9

@callielovesyhuu

Answer 10

Answer A.

Isotopes only differ because of the number of neutrons. Carbon-12 and Carbon-14 will have the same number of protons and electrons. The only change is that Carbon-14 has 2 additional neutrons.

Answer 11

Which of the following is true statement about isotopes?

A.
The number of protons always equals the number of neutrons in all isotopes.

B.
The number of protons never equals the number of neutrons in an isotope.

C.
Different isotopes for the same element will always have the same numbers of neutrons.

D.
Different isotopes for the same element always have the same number of protons.
@callielovesyhuu

Answer 12

D.

Notice for the Carbon question they were the same element and the shared the same number of protons. :)

Answer 13

What determines the chemical properties of an element?

A.
the number and arrangement of the electrons in an atom

B.
the number of neutrons and protons in an element

C.
the arrangement of all the neutrons, protons, and electrons

D.
the atomic mass of an atom
@callielovesyhuu

Answer 14

@callielovesyhuu

Answer 15

its ok i passed my test @callielovesyhuu

Answer 16

sorry i got busy @Julianne6th