unit 3

Question 1

Define

What an atom is

Answer 1

Smallest block (unit) of matter

Question 2

what is the difference between the isotopes of a different element

Answer 2

Isotopes are atoms of the same element, with different numbers of neutrtons

Question 3

Why are the atomic masses of elements on the periodic table not whole numbers

Answer 3

Weighted average of the masses of teh different isotopes (think graded categories)

Question 4

Filling the levels from 1 up filling in s shells before p shells

Answer 4

Aufbau principle

Question 5

paired electrons must have opposite spins

Answer 5

Pauli exclusion

Question 6

must fill each subshell before pairing. Unpaired electrons have the same spin

Answer 6

Hund’s rule

Question 7

What is the equation for RAM

Answer 7

RAM = (a1)(m1) +(a2)(m2) + …..

Question 8

How is light is emitted from the atom

Answer 8

Light is emitted from an atom when an electron jumps energy levels. This is called the excited state. When electrons are back in their ground state they produce light.