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CHEM 104 EXAM #2|Questions with 100% Correct Answers

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CHEM 104 EXAM #2|Questions with 100% Correct Answers Periods are horizontal rows(1-7) groups are vertical columns (1A-8A) Metals are 70%, shiny, ductile, heat, electricity Non-metals are dull, brittle, good insulators metalloids are better conductors than non-metals, not as good as metals...

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  • May 16, 2024
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  • 2023/2024
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CHEM 104 EXAM #2|Questions with 100% Correct Answers
Periods are

horizontal rows(1-7)

groups are

vertical columns (1A-8A)

Metals are

70%, shiny, ductile, heat, electricity

Non-metals are

dull, brittle, good insulators

metalloids are

better conductors than non-metals, not as good as metals

3B-12B is

transition metals

1A-8A is

representative elements

Alternative System

1-18

1A

alkali metals

2A

Alkaline Earth Metals

3A-6A

no common names

7A

Halogens -1

8A

Noble Gases

P+

, proton: positively charged +1

n

neutron, charge is 0

e-

electron,

An atom consist of

a nucleus that contains protons and neutrons
-electrons in a large empty space between nucleus

Atomic # is also

Protons and Electrons

isotopes

atoms of the same element, but have different atomic mass

nucleus that is radioactive

radiation

Atom

smallest particle of an element that retains characteristics of that element

representative elements

1A-8A

Valence Electrons

# of electrons in the outermost energy level

Group # gives the

# of valence electrons for the representative elements

Atomic size increases going

down a group

atomic size decreases

going up from left to right across a period

metallic characters

the ability to lose electrons
-more prevalent in metals
-less for nonmetals on the right side of the periodic table, which doesn't lose electrons easily

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