chapter 3

Question 1

periodic table

Answer 1

elements are arranged according to their atomic number

atomic number = number of protons in the nucleus

Question 2

periodic table format

Answer 2

metals, inner-transitional metals, semi-metals and non metals

Question 3

alkali metals

Answer 3

1 electron in outer most valence orbital.

have bright silvery appearances, malleable and good conductors of electricity. low melting point and easy to cut

Question 4

alkaline earth metals

Answer 4

they react by losing 2 electrons (+2e)

Chemical formula = x^+2

Question 5

halogens

Answer 5

they react by gaining an electron (x^-1)

Question 6

bonding

Answer 6

hey way atoms join together

Question 7

covalent bond

Answer 7

it is formed when two or more atoms share electrons

only show valance electrons

Question 8

cations

Answer 8

no charged atoms

Question 9

Anion

Answer 9

negatively charged atoms

Question 10

Giant ionic lattice

Answer 10

A lattice of alternating postive and negative ions

Question 11

Giant molecular lattice

Answer 11

A giant molecule making the lattice

Question 12

Simple molecular substances

Answer 12

Consisting of simple molecules in a lattice held together by weak forces to gain