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atoms and periodic table
Flashcards
22 cards
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Practice quiz
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Questions
22
Answers
1
What element has 4 protons?
helium
beryllium
boron
hydrogen
2
An atom is electrically neutral because
neutrons balance the protons and electrons.
the numbers of protons and neutrons are equal.
nuclear forces stabilize the charges.
the numbrs of protons and electrons are equal.
3
Which subatomic particle is responsible for how an atom reacts?
neutron
electron
proton
nuclide
4
How many valence electrons does nitrogen have?
-3
6
5
+1
5
What ionic charge do your halogens have?
+2
-1
-2
+1
6
All elements in group 18 are __________ at room temperature.
gases
plasma
liquids
solids
7
Which of the following elements has only 2 orbitals?
krypton
hydrogen
aluminum
lithium
8
Elements on both sides of the stair-step lines are known as ___________.
nonmetals
metals
metalloids
elemental fad
9
A subatomic particle that has the same mass as a proton, and no charge is called a(n)
isotope
neutron
electron
nuclide
10
How many neutrons does sodium have?
12
35
23
11
11
Where are the eletrons located?
electron cloud
protons
stability cloud
nucleus
12
How many neutrons does the the average element of gold have?
67
79
118
197
13
The total number of protons and neutrons in the nucleus of an atom is its
Avogrado constant
atomic number
number of neutrons
atomic mass
14
All atoms of the same element have the same
atomic number
mass number
number of neutrons
atomic mass
15
Elements in group 1a-8a are known as ________________.
transition metals
fundamentals
representative elements
important elements
16
Columns on the periodic table are known as ____________.
friends
group
period
octets
17
Which of the following is a liquid at room temperature?
helium
xenon
phosphorous
bromine
18
Aluminum has how many orbitals/energy levels?
17
2
3
6
19
The smallest unit of an element is the
neutron
atom
electron
proton
20
Calcium is a ____________.
metalloid
nonmetal
metal
21
Isotopes are atoms of the same element that have different
number masses
both masses and neutrons
numbers of protons
numbers of neutrons
22
What is the mass on the periodic table for carbon?
18
120
12
6
