part 1 - module 3

Question 1

molecular element

Answer 1

more than 1 atom of the SAME element bonded

N2

pg 23

Question 2

molecular compound

Answer 2

one or more DIFFERENT elements bonded

H2O

Question 3

diatomic elements

Answer 3

elements that exist in nature as molecules of two of the same element.

eg. H2

diatomic elements 🔗halogens [group 17] + hydrogen, nitrogen, oxygen (pg25 - includes mnemonic to remember)

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Question 4

chemical bonding (3 types)

Answer 4

1. covalent - between 2+ non-metals
2. ionic - between a metal and non-metal
3. metallic - between 2+ metal atoms

bonds are formed through the valence electrons

Question 5

covalent bonds

Answer 5

• strongest type of chemical bond
• covalent bonds are common

Question 6

ionic bonds

Answer 6

electrons transferred between atoms - metal & non-metal.

eg. Na (metal) - gives electron to -> becomes a cation
** Cl (non-metal)** - accepts electron -> becomes an anion

making ionic compound: NaCl

Question 7

Empirical formulas

Answer 7

a short-hand way of expressing a chemical formula

pg29

Question 8

structural formulas

models

Answer 8

1. ball and stick model
2. space filling models

Question 9

ionic compounds

and types of ions

Answer 9

• metal🔗non-metal; anion & cation
• results: compounds must be equally neutral

ions:
- cations, anions
- monatomic (single atom ions)
- polyatomic (ions made out of many atoms)