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Periodic Table Flashcards | StudBud
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Periodic Table
Periodic Table
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1
The element in Period 3, Group 1 is _____________
Scandium
Lithium
Sodium
2
Almost all the mass of an atom is found where?
in the energy levels
inside the nucleus
in the electron cloud
3
The ________________ determine the identity of the element
number of electron shells
number of protons
number of electrons
number of neutrons
4
How many protons does Neon have?
8
20
10
9
5
How many electrons does Potassium have?
19
39
20
10
6
Which part of the atom is positive?
neutrons
electron cloud
The nucleus
7
What is He oxidation number?
0
-2
-1
+3
8
Atoms of the same element with different numbers of neutrons are
metalloids
transition elements
neutrons
isotopes
9
A neutrally charged atom will have the same number of
electrons and protons
protons and neutrons
electrons and neutrons
10
Each energy level have a maximum number of _____ it can hold.
protons
electrons
protons
neutrons
11
A certain atom has 5 protons, 5 electrons, and 6 neutrons. Its mass number is
10
30
11
25
12
The _____________ are considered negatively charged
neutrons
protons
electrons
