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UNIT 4- CHEMISTRY Elements and Periodic Table Flashcards | StudBud
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UNIT 4- CHEMISTRY Elements and Periodic Table
UNIT 4- CHEMISTRY Elements and Periodic Table
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#periodictable #atomicstructure #isotopes #metalsnonmetalsmetalloids
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Answers
1
An elements mass number is the mass of ....
atoms + neutrons
electrons + nucleus
protons + electrons
neutrons + protons
2
What part or parts of an atom accounts for most of its mass?
protons and neutrons
protons only
electrons and neutrons
electrons only
3
which elements are noble gases?
Flourine and Chlorine
Beryllium and Calcium
Neon and Argon
Oxygen and Sulfur
4
How many neutrons does this element have?
33
42
75
107
5
The atomic number of an element is determined by the number of
protons
isotopes
neutrons
nuclei
6
In the modern periodic table, the elements are in order by _______________
atomic number
alphabetical
atomic mass
number of neutrons
7
What does each row of the periodic table have in common?
same properties
same type of isotopes
same atomic mass
same number of electron shells
8
Two isotopes of an element have the same number of protons but different _____________
electron shells
neutrons
elements
electrons
9
What number is always increasing on the modern day periodic table?
number of isotopes
number of electrons in outermost shell
atomic number
the amount of metals
10
On the periodic table, electrons are added going to what position
up
down
right
left
11
Which family of elements on the periodic table contain the most reactive metals?
noble gases (group 18)
halogens (group 17)
transition metals
lanthanides
12
Which Scientist's contribution to atomic theory is depicted
Bohr
Rutherford
Thomson
Dalton
13
If Carbon has atomic number of 6, how many neutrons does the isotope Carbon-12 have?
12
24
18
6
14
Who is credited with discovering the first version of the periodic table.
Dimitri Mendeleev
John Dalton
Thomas Rutherford
Niels Bohr
15
If an atom has 35 protons in its nucleus how many electrons will it have orbiting the nucleus?
34
8
1
35
16
How many protons does this element have?
101
157
95
258
17
Isotopes differ in ______________, not atomic number
volume
protons
density
mass
18
Which element has 56 protons?
Iron
manganese
Chromium
Barium
19
which element in period 4 would have chemical properties similar to Oxygen?
Phosphorus
Sulfur
Nitrogen
Selenium
20
Atoms with the same number of protons and different number of neutrons are called....
elements
alkali earth metals
isotope
metalloid
21
How many neutrons does this element have?
95
101
157
258
22
Based on the figure above, what does the number 83.80 tell about each krypton atom?
number of neutrons and protons in one isotope of an element
number of neutrons in one isotope of an element
weighted average mass of the isotopes of an element
average number of neutrons in the isotopes of an element
23
What is the smallest particle that can still be considered an element
molecule
electron
proton
atom
24
The center of at atom is called the ___________
electron
neutron
proton
nucleus
25
Of the following, the group that contains elements that are most reactive are
noble gases
carbon family
alkali metals
transition metals
26
Elements that are in the same group have similar...
electron shells
energy levels
properties
melting points
27
The illustration shows an experiment performed by which scientist?
Thomson
Rutherford
Crookes
Dalton
28
What is the mass number of the atom that is pictured
6
3
9
1
29
Elements in a column form a ____________on the periodic table.
friend
period
property
group
30
Which atom has 47 protons in its nucleus?
Silver
Potassium
Titanium
Strontium
31
Who's contribution to Atomic Theory is depicted
Thomson
Dalton
Rutherford
Democritus
32
The positively charged particles in an atoms nucleus are called ______________
elements
neutrons
protons
electrons
33
The flame test helped to prove who's contribution to atomic theory?
Bohr
Thomson
Dalton
Rutherford
34
Hydrogen has 3 naturally occurring isotopes. Which describes the relationship of these isotopes
different mass, same atomic number
different mass, different atomic number
same mass, same atomic number
same mass, different atomic number
35
What is the atomic number of the atom pictured?
6
3
9
1
36
What element is pictured?
Sodium
Calcium
Neon
Flourine
37
The periodic table is arranged in rows called
columns
groups
family
periods
38
which element has 2 more protons that Nickel?
Platinum
Zinc
Iron
Palladium
39
An electron's movement is related to its ________________
element
energy level
charge
electrons
40
How many neutrons are in the nucleus of an atom with atomic number 25?
30
24
37
25
