Question

Can you guys quickly check my answers before i submit please:)

Answer 1

Which two subatomic particles are located within the nucleus of an atom?
Question 1 options:

protons and electrons

protons and neutrons<

electrons and neutrons

Answer 2

An atom has 2 protons in its nucleus. Which of the following must be true for this atom to have no net charge?
Question 2 options:

The atom also has 2 positively charged neutrons in the nucleus.<

The atom has 2 negatively charged electrons outside the nucleus.

The 2 positive protons have no influence on the overall charge of the atom.

The atom has 2 negatively charged electrons in the nucleus.

Answer 3

Ernest Rutherford's gold-foil experiment showed which of the following?
Question 3 options:

the existence of subatomic particles within an atom<

the existence of a dense, positively charged center in an atom

the existence of electrons in an atom

the existence of subatomic particles with no charge in the nucleus

Answer 4

How did Rutherford discredit Thomson's plum pudding model of an atom?
Question 4 options:

He conducted an oil drop experiment.


He didn't discredit the plum pudding model of the atom, she proved it.

He conducted an experiment using gold foil and alpha particles.<

He conducted experiments with a cathode-ray tube.

Answer 5

Where is most of the mass of an atom?
Question 5 options:

inside the nucleus<

distributed around the atom like the shell of an egg

outside the nucleus

distributed throughout the atom

Answer 6

An atom of lithium has 3 protons. How many electrons must be circling the atom if it has a net charge of 0?
Question 6 options:

3<

6

1

2

Answer 7

@Photon336 @DarrenMadx @Cuanchi

Answer 8

Thanks you a ton

Answer 9

they look good to me

Answer 10

2 and 3 looks wrong to me.
You want to try again or let me explain?

Answer 11

Explain please:)\

Answer 12

2nd is wrong because they clearly says that there's no net charge, so if u have 2 protons u should have 2 electrons because protons are positive and electrons are negative.

Answer 13

oh yes i agree i missed that 2 electrons are need to make it unccccccccharged

Answer 14

Yea what she said ^
and electrons are found outside the nucleus, while proton and neutrons are inside the nucleus.

Answer 15

For 3rd one it is the 2nd option

Answer 16

oh put the wrong < for two

Answer 17

For the gold foil experiment, protons,, electrons, and neutrons are already known. They found out that in a center of an atom, there is a dense heavy spots that contains proton and neutrons called the nucleus.

Answer 18

his experiment showed that an atom had a dense positively charged centre.

Answer 19

ok so it was only 2 and 3

Answer 20

yes rutherford shot alpha particles through gold foil.

Answer 21

Yeah all the others are correct bubs !!!

Answer 22

can some one also give @Shalante a metal please:)

Answer 23

Done @PrincestonA

Answer 24

and thanks guys

Answer 25

Anytym :)