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Chem 130 > Ch4 > Flashcards

Ch4 Flashcards

1
Q

what group is halogens

A

group 17

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2
Q

diatomic

A

two atoms of same element

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3
Q

molecule definition

A

things formed by chemical bonding

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4
Q

why do chemical bonds form

A

to reduce potential energy of charged particles

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5
Q

why does bonding lower potential energy

A

valence shells get filled which makes atom not want to react anymore

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6
Q

Do more complicated molecules have lower potential energy or simpler ones

A

simpler ones have lower potential energy

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7
Q

lattice energy

A

amount of energy it takes to forms crystalline lattice

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8
Q

Ionic compound

A

ionic compound exchanges electrons between two elements that makes the element neutral

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9
Q

What does higher lattice energy mean

A

something is more exothermic and it means the chemical has higher boiling point

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10
Q

empirical formula

A

simplest whole number ratio of the atoms

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11
Q

molecular formula

A

exact number of each atom in molecule

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12
Q

structural formula

A

shows connectivity of atoms

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13
Q

formula mass

A

mass of atoms in the formula in (amu)

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14
Q

molar mass

A

mass or 1 mole or molecule in grams

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15
Q

which elements expand their octets

A

row 3 and below

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16
Q

ionic bond has what as components

A

metal and nonmetal

17
Q

what are components of covalent bond

A

two nonmetals

18
Q

Anion

A

gains electron

19
Q

cation

A

loses electrons

20
Q

covalent bond does what with electrons

A

share (coparent)

21
Q

ionic bond does what with electrons

A

transfers them

22
Q

which element is listed first in names

A

metal or more positive element

23
Q

what can be inferred about shorter bonds

A

they are stronger

24
Q

duet

A

pair of 2 electrons

25
Q

Where does unaccounted energy go in chem reaction

A

emitted as heat

26
Q

percent composition equation

A

divide mass by molar mass divided by smallest molar amount

27
Q

what is an ion

A

a element or molecule with net charge

28
Q

how do u name normal ionic compound

A

metal name plus nonmetal with suffix ide

29
Q

how to name element metals that have multiple ions

A

name of metal and it’s charge in roman numerals plus name of nonmetal with suffix ide

30
Q

what is true about ionic compounds and the charges of their reactants

A

one with be positive one will be negative

31
Q

common name

A

name that element has been given like bleach and stuff

32
Q

systematic name

A

official name of compound

33
Q

Oxyanions

A

a polyatomic anion with nonmetal covalent my bonded to one or more oxygen atoms

34
Q

Hydrate

A

An ionic compound with specific number of water molecules associated with each formula unit

35
Q

Anhydrous

A

hydrate without water

36
Q

what is an organic compound

A

a compound with carbon

Chem 130 (20 decks)

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