Properties and group trends rest of chap 7 Flashcards Preview

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Flashcards in Properties and group trends rest of chap 7 Deck (24):
1

Metals tend to form

cations (+).

2

Nonmetals tend to form

anions (-).

3

The first ionization energies for metals are much ____ than those of nonmetals.b/c

lower, is easy to remove electrons from metals, they tend to form cations (+

4

metals They tend to be

lustrous (shiny), malleable (sheets), ductile (wires), and good conductors of heat and electricit

5

Compounds formed between metals and nonmetals tend to be

ionic

6

Most metal oxides function as

bases

7

nonmetals They tend to be

dull, brittle substances that are poor conductors of heat and electricity.

8

Nonmetals tend to have ______ electron affinities

very negative

9

Compounds formed between nonmetals and nonmetals are

molecular compunds

10

Most nonmetal oxides form

acids in water.

11

Metalloids

For instance, silicon looks shiny, but is brittle and fairly poor conductor.

12

Group 1A, Alkali Metals

soft, metallic solids,Largest atomic radii, very exothermic reactions

13

Group 1A, Alkali Metals low..

low densities and melting points.and ionization energies

14

Group 2A, Alkali Earth Metals compares. Alkali metals

higher densities and melting points than alkali metals.
Their ionization energies are low, but not as low as those of alkali metals.

15

Alkali Earth Metals Reactivity tends to increase as you go down the group what are some examples

Beryllium does not react with water and magnesium reacts only with steam, but the others react readily with water

16

Group 6A React vigorously with __________ and __________
Forms ...

alkali and alkali earth metals
metals, metalloids, and nonmetals

17

Group 6A Oxides:

XO2, XO3

18

Allotropes are

different forms of the same element in the same physical state.

19

two allotropes of oxygen:

O3, O2

20

Sulfurs stable allotrope at room temperature is

S8

21

Group 7A: Halogens have high

electronegativity (electron affinity)

22

Group 7A: they tend to ____other elements easily.

oxidize

23

Group VIIIA: Noble Gases the highest and have positive

ionization energies, electron affinities

24

Noble Gases elements that form compunds

Xe (XeF2 XeF4 XeF6)
Kr forms only one stable compound:
KrF2