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Atoms & the Periodic Table
Atoms & the Periodic Table
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#science#8thgrade#unit5#2018#review
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1
An interaction that holds atoms or ions together
Chemical attraction
Chemical bond
Chemical reaction
Ionic Bonding
2
What are valence electrons?
electrons found in the second energy level
electrons found in the innermost energy level
electrons found in the outermost energy level
electrons found in around the nucleus
3
Look at this diagram. By whom was this model of an atom proposed?
Bohr
Thompson
Dalton
Rutherford
4
The atomic number of an atom describes its...
Neutron number
Mass number
Electron number
Proton number
5
What did Dalton state in his theory of the atom?
all matter made of atoms, atoms of certian elements same
electrons move around the nucleus in a circular path
atoms have a nucleus that is positively charged
atoms are made up of smaller particles negatively charged
6
These particles have no charge. What are they?
Neutrons
Quarks
Electrons
Protons
7
In 1808, a British chemist was the first to publishe an atomic theory. Who was he?
Max Planck
JJ Thompson
John Dalton
Ernest Rutherford
8
Atoms that have different numbers of neutrons are called
cations
anions
ions
isotopes
9
What happens to atoms during chemical changes?
atoms are destroyed
nothing happens
atoms are rearranged
new atoms form
10
The total number of protons and neutrons in an atom's nucleus is its
Proton number
Atomic weight
Mass number
Atomic number
11
Ionic bonds form between...
two nonmetals
a metal and a nonmetal
two metals
12
The smallest particle into which an element can be divided and still be the same element
Molecule
Atom
Proton
Cell
13
How many neutrons are in an atom of bromine?
46
45
48
35
14
True or False: atoms always have equal numbers of protons and neutrons
True
False
15
Sulfur is in Group 16, how many valence electrons does sulfur have
3
4
2
6
16
The second energy level can hold up to ---- electrons
8
2
1
16
17
What is an ion?
An atom with a different number of protons
A molecule
A particle with a positive charge or a negative charge
An atom with a different number of neutrons than protons
18
What kind of bond forms between atoms of a water molecule?
Covalent bonds
Metallic bonds
Hydrogen bonds
Ionic bonds
19
What must happen for an ion to form?
An atom must gain or lose a neutron
An atom must gain or lose an electron
An atom must gain or lose a nucleus
An atom must gain or lose a proton
20
A force that brings oppositely charged ions together
covalent bond
chemical bond
metallic bond
ionic bond
21
Which Greek philosopher thought that you'd eventually end up with a particle that cant be cut?
Democritus
Aristotle
Pluto
Socrates
22
What information is contained in each square on the periodic table?
Atomic number, Atomic symbol, Element name, and Mass number
Proton #, Atomic weight, Element name and Oxidation states
Mass number, atomic weight, atomic symbol, and element name
Proton #, atomic symbol, and element name
23
How are elements classified?
Atomic #s, atomic mass, chemical symbols, and element names
chemical properties, and physical properties
Metals, nonmetals, and metalliods
Metals, Liquids, and gases
24
All of the following properties are shared by most covalent compounds EXCEPT...
low melting and boiling points
electrical conductivity
Low solubility in water
poor electrical conductors
25
The first energy level can hold to ---- electrons
1
3
8
2
26
Which of the following is NOT a physical properties of ionic compounds?
Crystal lattice structure
high melting and boiling points
brittleness
low solubility of water
27
This bond forms when atoms SHARE electrons
Metallic Bond
Covalent Bond
Ionic Bond
Hydrogen Bond
28
True or False: Metals are good electrical conductors and are malleable and ductile
True
False
29
Who is associated with the "Plum Pudding" model?
JJ Thompson
John Dalton
Ernest Rutherford
James Chadwick
30
The energy level furthest from the nucleus is called
innermost energy level
Last energy level
f orbital energy level
outermost energy level
31
Why do atoms form bonds?
because they are attracted
the reasons are unknown
because atoms tend to gain electrons
they have less than 8 valence e- on their outermost level
32
In a neutral atom, the number of electrons equals the number of what other part?
Energy levels
Neutrons
Protons
Nuclei
33
These particles are negatively charged. What are they?
Quarks
Protons
Neutrons
Electrons
34
Who discovered the protons?
JJ Thompson
James Chadwick
Ernest Rutherford
John Dalton
35
How many groups are on the periodic table?
17
7
18
8
36
What is the chemical symbol for Potassium?
K
Pm
P
Po
37
Which instrument do we use to look at atoms?
Compound Microscope
Light Microscope
Electron Microscope
Magnifying Glass
38
These particles are positively charged. What are they?
Protons
Neutrons
Quarks
Electrons
39
Bohr suggested that e- move around the nucleus in circular paths. When did he publish this?
1915
1914
1912
1913
40
In general, covalent compounds have ______ boiling points
Medium
High
Low
41
The symbol Fe stands for?
Iron
Ferric Acid
Phosphorus
Flerovium
42
Who was the first to organize elements in the periodic table?
Dmitri Mendeleev
Gregor Mendel
Gregor Mendeleev
Henry Moseley
43
What is the chemical symbol for Mercury?
Mc
M
Hg
Hf
44
How many periods are on the periodic table?
8
17
7
18
45
Who discovered the electrons?
JJ Thompson
John Dalton
James Chadwick
Ernest Rutherford
46
How many valence electrons does Fluorine have?
6
1
7
5
47
Which of the following is a property of metal?
Cannot bend without breaking
Good electrical conductor
Good thermal insulator
Low melting point
48
The group of elements highlighted in red are called
Lanthanides
Metalliods
Metals
Nonmetals
49
True or False: elements are arranged in order of increasing atomic numbers
False
True
50
O
2
is a ...
compound
atom
molecule
element
51
This bond forms between metal atoms when their outermost energy levels overlap
Hydrogen bond
Metallic bond
Ionic bond
Covalent bond
52
Who discovered the neutrons?
JJ Thompson
James Chadwick
Ernest Rutherford
John Dalton
53
A group of atoms held together by chemical bonds
Compound
Elements
Molecule
Atoms
54
Ernest Rutherford conducted an experiment to study the parts of the atom. What did he discover?
the nucleus contians uncharged particles called neutrons
electrons move within an area around the nucleus (e- cloud)
found particles within the atom that have a negative charge
atoms have a nucleus with a positive charge surrounded by e-
55
Which of the following is a physical property of ionic compounds?
crystal lattice structure
low solubility of water
poor electrical conductors
low melting and boiling points
