RAM and Electronic Structures

Question 1

What does the mass number symbolise

Answer 1

Amount of protons and neutrons

Question 2

What does the atomic number symbolise

Answer 2

Protons

Question 3

Cation

Answer 3

Positive ion ( metals)

Question 4

Anion

Answer 4

Negative ion (non metals)

Question 5

Ar ( Atomic mass) calculation

Answer 5

(Isotopic mass x % abundance)
——————————————-
100

Question 6

How to write electronic configuration

Answer 6

1s2 2s2 2p6 3s2 3p6 4s2 3d10…

Question 7

Electronic configuration exceptions

Answer 7

Chromium(cr): 1s2 2s2 2p6 3s2 3p6 4s1 3d5

Copper (cu): 1s2 2s2 2p6 3s2 3p6 4s1 3d10

Question 8

Energy level diagrams rule

Answer 8

Fill one arrow at a time in each space then add a second next to it if necessary

Question 9

Blocks in periodic tabe

Answer 9

Question 10

Ionic bond

Answer 10

-M and Nm transfer of electrons
-strong electrostatic forces of attraction between oppositely charged ions
-Create a giant ionic lattice

Question 11

Physical properties of ionic compounds

Answer 11

-High mp & bp as theres many strong electrostatic forces that require a lot of energy to overcome
-Mp determined by how strong the bond is ( smaller ion stronger bond & higher charge stronger bond)
-only conduct electricity when molten or aqueous
-can dissolve in water

Question 12

Metallic bond

Answer 12

-merge outershells and share electrons
-lattice of positively charged metal ions attracted to a sea of delocalised electrons
-more delocalised electrons = stronger bond
-higher ionic charge = stronger bond
-Small atomic radius = stronger bond

Question 13

Properties of metals

Answer 13

-good conduction of electricity due to delocalised electrons carrying it
- high mp and bp due to strong attraction hard to overcome
-Malleable as ions can slide over eachother

Question 15

Dative covalent bonding

Answer 15

-Atom donating electrons will have a lone pair of electrons
-Atom receiving electrons has a vacant orbital
- bond represented with an arrow instead of a line

Question 16

Electronegativity

Answer 16

The power if an atom to attract the pair of electrons in a covalent bond
-increases as you go to the right if the periodic table
-increases as you go up the table

Question 17

Electronegativity explained

Answer 17

Each element given a number based on nuclear charge atomic radius and number of principal energy levels. F is highest (4.0) anything near it is also high