Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Chemistry > Exam 1 > Flashcards

Exam 1 Flashcards

1
Q

matter in which physical state has no specific shape but does have a specific volume is>

A

liquid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

if matter is uniform throughout, cannot be separated into other substances by physical processes, but can be decomposed into other substances by a chemical process, that matter is called?

A

a compound

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

which of the following is a chemical reaction?

  • melting of lead
  • dissolving sugar in water
  • tarnishing of silver
  • crushing of stone
A

tarnishing of silver

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what does precision refer to

A

how close a measured number is to other measured numbers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

which of the subatomic particles is the smallest and lightest

A

electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what are homogeneous mixtures also known as

A

solutions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

which of the following is a pure substance?

  • concrete
  • wood
  • salt water
  • elemental copper
  • milk
A

elemental copper

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

isotopes are atoms that have the same number of protons but differing number of

A

neutrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

magnesium would be classified as:

  • homogeneous mixture
  • heterogeneous mixture
  • compound
  • pure substance
  • solid
A

pure substance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Has mass and takes up space

A

matter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Identical Composition throughout

A

homogeneous substances

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Physically Distinct Regions

A

heterogeneous mixtures

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Homogeneous Matter of fixed composition and concentration

A

pure substance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Cannot be decomposed by chemical means

A

elements

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Composed of two or more elements bonded in a fixed ratio.

A

compounds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

The capacity to do work, or transmit heat

A

energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

The energy transferred when a Force exerted on an object causes a displacement

A

work

18
Q

the energy required to cause the temperature of an object to increase

A

heat

19
Q

If an atom loses one or more electrons

A

positively charged ion

20
Q

If an atom gains one or more electrons,

A

negatively charged ion

21
Q

most metals are:

A

shiny solids, with high melting points and densities.

22
Q

properties of metals

A

large atomic radius, low ionization energy, and low electronegativity

23
Q

most nonmetals are:

A

high ionization energies and electronegativities.
poor conductors of heat and electricity.
gain electrons easily

24
Q

two or more atoms tightly bonded together

A

molecule

25
Q

electrons in the outermost shell that can be gained or lost in a reaction

A

valence electrons

26
Q

in what type of bonding do electrons transfer over to eachother(no sharing)

A

ionic bonding

27
Q

in an ionic bond what loses electrons to become positively charged(cation)

A

metal

28
Q

in an ionic bond what gains electrons to become negatively charged(anion)

A

non-metals

29
Q

when does ionic charge occur

A

when an atom does not have a valence shell with 8 electrons

30
Q

The charge on an ion is given as what

A

super script to the right of the atomic symbol.

31
Q

sharing of electrons between atoms

A

covalent bonding

32
Q

contains two or more non metals

A

molecular compounds

33
Q

a notation that uses atomic symbols with numerical subscripts to convey the relative proportion of atoms of the different elements in the substance.

A

chemical formula

34
Q

gives the exact number of different atoms of an element in a molecule.

A

molecular formula

35
Q

lists the relative number of the different types of atoms in a molecule

A

empirical formula

36
Q

major class of chemical reactions, commonly referred to as “burning”.usually occurs when a hydrocarbon reacts with oxygen to produce carbon dioxide and water.

A

combustion

37
Q

when two or more compounds or molecules react to form a single product.

A

Combination reactions

38
Q

reactions where a single reactant decomposes to give two or more products.

A

decompostion reactions

39
Q

percent composition formula

A

(grams of element/grams of compound) *100%

40
Q

what is avogadro’s number

A

6.022 x10^23

Chemistry (13 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions