5.1 + 5.2 Flashcards Preview

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Flashcards in 5.1 + 5.2 Deck (17):
1

Why are octets formed?

so atoms can be more stable

2

how are octets formed?

by sharing (covalent) or transferring of electrons (ionic)

3

covalent compounds

nonmetals share electrons

4

ionic compounds

metal electron transferred to nonmetal

5

what kinds of compounds are minerals?

ionic compounds

6

what are sapphires and rubies made from?

Aluminum oxide

7

octet rule

tendency for atoms to obtain 8 valence electrons

8

what doesn't the octet rule apply to?

transition elements

9

what makes noble gases stable?
exception

it has an octet
exception: helium

10

Is helium stable?

yes, it is stable with valence electrons

11

cations
formed by?

positive ions
formed by metals that lose electrons

12

anions
formed by?

negative ions
formed by nonmetals that gain electron

13

what happens to the ending go anions?

it ends in -ide

14

ionic compounds
consists of?
melting/boiling point?
state @ room temp?

consists of positive and negative ions
high melting and boiling points
solid @ room temperature

15

what kinds of attractive force do ionic compounds have?

ionic bonds

16

chemical formulas of ionic bonds are written as:

cations first, then anions

17

formula unit

lowest ratio of ions for an ionic compound to be balanced