ch. 18

Question 1

What group of elements is stable?

Answer 1

Noble gases

Question 2

Why do atoms lose or gain electrons?

Answer 2

to make it more stable

Question 3

In an electron dot diagram the symbol of the element represents what? What do the dots represent?

Answer 3

valence electrons

Question 4

when are the atoms/elements stable?

Answer 4

when they habve 8 valence electrons

Question 5

Ionization energies tend to do what in the periodic table?

Answer 5

increases left to right, decreases top to bottom

Question 6

what is an ionic bond

Answer 6

transfer of electrons

Question 7

what is an anion? what is an cation?

Answer 7

negative charge ( flouride), positive charge (sodium No+1)

Question 8

what does the subscript number indicate in a formula?

Answer 8

how many of it are there

Question 9

what are the properties of an ionic bond?

Answer 9

tendency to shatter

Question 10

when 2 attoms of the same element combine what is forme?

Answer 10

diatomic molecule

Question 11

in a structural formula the dash represents what kind of chemical bond? (H-H)

Answer 11

single colvalent

Question 12

how do you write the structural formula between 2 hydrogen atoms as a triple bond?

Answer 12

HEH

Question 13

what is a polar covalent bond?

Answer 13

electrons not shared equally

Question 14

what shape are the molecules in a polar bond?

Answer 14

bent

Question 15

during a covalent bond how are the electrons distributed between 2 atoms

Answer 15

evenly

Question 16

what grp of elements is most likely to form more than one type of ion?

Answer 16

transition metals

Question 17

when writing the name of a formula/compound which elemet changes its suffix to ide (Ex. NaCl)

Answer 17

chloride

Question 18

what does a Roman numeral represent in a formula?(Ex. Iron (II) oxide)

Answer 18

ions charge

Question 19

alkali metals, alkaline earth metals, and aluminum all form ions with positive charges = to what?

Answer 19

group number

Question 20

in carbon dioxide, the prefix in the 2nd word indicates

Answer 20

it contains 2 oxygen atoms

Question 21

the compound with the formula SiCl2 is called what

Answer 21

silicon chloride

Question 22

LLOY that contains mainly iron and carbon is what

Answer 22

steel

Question 23

between potassium and bromine which on would be more reactive and why

Answer 23

potassium bc it gives electrons

Question 24

what 2 properties of metals describes the structures of metals

Answer 24

conductivity and malleability