Atomic Structure

Question 1

Def Atomic Mass

Answer 1

The average mass of all isotopes of an element compared to 1/12 of carbon 12

Question 2

Def Isotopes

Answer 2

The same element with different number of neutrons but with the same number of protons

Question 3

Explain Electron Gun/Impact

Answer 3

Fires electrons at each particle to create 1 mole of ions

Question 4

Explain Electrospray

Answer 4

-Sample gets dissolved in Volatile Substance
-Injected through a fine needle under high voltage
-The needle is attached to a positive terminal and removed H+ Ions

Question 5

What is bad about Electron Gun

Answer 5

Create debris on larger molecules

Question 6

TOF: Acceleration

Answer 6

Pos ions travel down a neg charged plate accelerated with the same amount of KE

Question 7

TOF: Ion drift

Answer 7

Pos Ions move freely in a vacuum

Question 8

TOF: Detection

Answer 8

Electrons move from the neg charged plate to the pos ions creating a current read by a computer

Question 9

Def of first Ionisation Energy

Answer 9

The amount of energy needed to remove 1 mol of electrons from 1 mole of a gaseous atom to form 1 mol of a gaseous positive ions