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Chemistry > elements and compounds > Flashcards

elements and compounds Flashcards

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1
Q

Compounds that are physically combined form another kind of matter known as

A

mixtures

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2
Q

Both elements and compounds participate in ———— to create ew compounds

A

Chemical reaction

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3
Q

Compounds that are physically combined form another kind of matter known as

A

Mixtures

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4
Q

the simplest form of matter
made up of only one kind of atom
elements of different kinds also differ in the atoms that make them up

A

Element

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5
Q

composed of two or more different elements that are combined in a fixed ratio by a chemical reaction

A

Compound

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6
Q

How many elements known to exist arranged in the periodic table of elements

A

118

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7
Q

cannot be decomposed into simpler forms by physical or chemical means

A

Elements

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8
Q

React to form new substances

A

Element

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9
Q

Ennumerate element symbol:

Hydrogen

A

H

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10
Q

BORON SYMBOL

A

B

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11
Q

Helium

A

HE

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12
Q

Lithium

A

Li

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13
Q

Cobalt

A

Co

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14
Q

Antimony

A

Sb

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15
Q

Copper

A

Cu

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16
Q

Gold

A

Au

17
Q

Four new elements have been officially added to the periodic table of elements in June of 2016. The four new elements namely (NMTO)

A

Nihonium, Miscovium, Tennessine, Organnessine

18
Q

is the arrangement of all known elements according to their chemical properties.

A

The periodic table of elements

19
Q

properties repeat themselves every few elements

A

pERIODIC

20
Q

elements arranged in rows and columns
columns:
rows:

A

columns: groups
rows: periods

21
Q

Periodic Table
shows the division of elements to ————–, ——————-. AND —————

A

METALS, NON-METALS, METALLOIDS

22
Q

lustrous solid at room temperature (except Hg, which is liquid)
hardness and tensile strength
ductility and malleability
good heat/electricity conductors
high melting point/boiling point

A

Metals

23
Q

General properties:
either solid or gas at room temperature (except Br2, which is liquid)
brittle and dull solids
poor conductors of heat and electricity
low melting and boiling points

A

Non-metals

24
Q

exhibit properties of both metals and nonmetal
conducts heat and electricity but not as good as how metals act as conductors

They are also semi-conductors

A

Metalloids/Semimetals

25
Q

a material that can conduct some electricity better than an insulator
some can conduct electricity as much as metals

A

Semiconductors

26
Q

Compound
a pure substance that is made up of different elements
atoms are joined together by

A

chemical bonds

27
Q

the process of creating compounds

A

Chemical Reaction

28
Q

kinds od chemical reaction

A

exothermic or endothermic

29
Q

a chemical reaction that gives off heat (i.e. combustion reaction)

A

Exothermic Reaction

30
Q

a chemical reaction that absorbs heat as it occurs, allowing it to produce new compounds (i.e. photosynthesis)

A

endothermic reaction

31
Q

Compounds may be categorized based on the presence of the element carbon: ——

may be categorized based on the type of bonding between the constituent elements: ————

A

organic or inorganic, ionic or covalent

32
Q

a class of compounds in which one or more carbon atoms are bonded to other elements, most commonly hydrogen, oxygen, or nitrogen

A

Organic Compounds

33
Q

a class of compounds lacking carbon-hydrogen bonds

everything else except carbon

comprise most of Earth’s crust

A

Inorganic Compounds

34
Q

compounds that exhibit ionic bonding

A

Ionic Compounds

35
Q

compounds that exhibit covalent bonding
electron sharing

A

Covalent Compounds

36
Q

are forms of matter that have a definite or fixed composition. They can be classified as elements or compounds

A

Pure Substances

Chemistry (9 decks)

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