Atomic Structure

Question 1

What is the mass of a proton/neutron

Answer 1

1.67x10^-27 kg

Question 2

What is the mass of an electron

Answer 2

9.11x10^-31

Question 3

What is atomic mass

Answer 3

The number of protons and neutrons combined

Question 4

What is atomic number

Answer 4

Number of protons

Question 5

What is atomic weight

Answer 5

The weighted average of all natural isotopes of an element

Question 6

What did bohrs atomic model demonstrate

Answer 6

Bohr included the idea of energy levels of electrons and that they all have certain orbits

Question 7

What did the wave-mechanical model have that bohrs model did not

Answer 7

It showed that electrons reside in and electron cloud and that the position of electrons was more of a probability.

Question 8

What are the four quantum numbers and h what do they show

Answer 8

The principle qn- size of the shells
The second qn - the shape of the subshells
The third qn- energy states for each subshells
The fourth qn - the spin moment of the electrons

Question 9

What side of the periodic table tends to accept electron and what side tends to give electrons.

Answer 9

The left side tends to give up electrons and are more electro positive. The right side tends to accept electrons and are more electro negative.