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Periodic Table 9th grade PS Flashcards | StudBud
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Periodic Table 9th grade PS
Periodic Table 9th grade PS
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1
Which family has all states of matter and is highly electronegative?
Alkali metals
Noble Gases
Alkaline Earth Metals
Halogens
2
Group 18 noble gases are inert because ___________.
their valence energy level is missing one electron
their valence energy level is full
they can have a - or + charge
they readily form positive ions
3
How many atoms can Hydrogen bond to?
1
3
4
2
4
What is the charge of an electron?
+1
0
-1
-2
5
Which of the following families form ions with a 1+ charge?
Noble Gases
Alkaline Earth Metals
Transition Metals
Alkali metals
6
Strontium has an atomic number of 38 and an atomic mass of 88. How many protons does it have?
126
88
38
50
7
Krypton has 36 electrons, and its atomic mass is 84. How many neutrons does it have?
84
48
36
12
8
The periodic table is arranged in order of each element's ___________?
atomic number
# of electrons
atomic mass
# of neutrons
9
Which family is made of the most reactive metals?
Halogens
Alkali Metals
Noble Gases
Alkaline Earth Metals
10
Which of the following is a liquid at standard temperature and pressure?
Helium
Neon
Bromine
Argon
11
Helium has 2 electrons and 2 neutrons. How many protons does it have?
2
1
3
4
12
C: atomic mass 12, 6 protons, & located in period 14. How many valence electrons does it have?
4
12
5
6
13
Which of the following elements has similar properties to potassium (K)?
Magnesium (Mg)
Calcium (Ca)
Rubidium (RB)
Strontium (Sr)
14
Which of the following is not a property of transition metals?
Ductile
Dull
Conductive
Malleable
15
What happens when water is added to an alkali metal from column 1 of the periodic table?
there is no reaction
it's explosive
new elements are created
a mixture is created
16
Which of the following is a solid at standard temperature and pressure?
Krypton
Potassium
Chlorine
Fluorine
17
Which subatomic particles are found in the nucleus?
only protons
protons, neutrons, & electrons
only neutrons
protons & neutrons
18
Magnesium is in column 2, row (period) 3. What energy level do its valence electrons occupy?
1st
3rd
4th
2nd
19
What did Bohr incorrectly theorize about the location of the electrons?
electrons remain in s and p orbitals
electrons hover in distant clouds
eletrons are located in one energy level
electrons orbit the nucleus like planets around the sun
20
Which family is made of inert gases?
Alkaline Earth Metals
Halogens
Alkali Metals
Noble Gases
21
True/False: All elements on the periodic table are found naturally on Earth.
False
True
22
Atoms have no electric charge because ________________.
they have an = # of charged an noncharged particles
have an = # of protons and neutrons
have neutrons in their nuclei
have an = # of electrons and protons
23
T/F: Mendeleev predicted properties of unknown elements from the order of the periodic table.
False
True
24
Nitrogen has an atomic mass of 14.007. Why is its atomic mass a decimal? Pick two answers.
The scale gave a precise mass
electrons contributed to its mass
It has isotopes
Atomic mass is the average number of neutrons plus protons
25
Krypton is an inert gas. Which family does it belong in?
Noble Gases
Alkali metals
Halogens
Alkaline Earth Metals
26
What charge do neutrons have?
Both positive and negative
Positive
None
Negative
