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Atoms, Elements, Periodic Table Flashcards | StudBud
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Atoms, Elements, Periodic Table
Atoms, Elements, Periodic Table
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A review of atoms, elements, and the periodic table
Flashcards
18 cards
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Practice quiz
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Questions
18
Answers
1
If an atom has 25 protons and 32 neutrons, what would be the atomic mass?
25
57
50
32
2
If an atom has an atomic mass of 72 and an atomic number of 30, how many neutrons are in the nucleus?
42
72
102
30
3
There are 17 electrons in the nucleus of an atom with an atomic number of 17.
False
True
4
Who was the first to organize the periodic table and even predict future elements?
Bohr
Mendeleev
Dalton
Thompson
5
How is the periodic table organized?
By atomic mass
By atomic number
By neutrons
By valence electrons
6
Which subatomic particle orbits around the nucleus?
positron
proton
neutron
electron
7
What is the atom called when it gains or loses neutrons?
valence electron
Isotope
Ion
positrons
8
What is a positively charged particle?
Proton
Neutron
Electron
Valence Electron
9
What category contains the most elements on the periodic table?
Halogens
Metalloids
Gases
Metals
10
The atomic number represents the number of which subatomic particle?
Neutrons
Electrons
Atomic mass
Protons
11
Which subatomic particle has a mass of almost 0 amu?
positron
proton
neutron
electron
12
Atoms are assumed to have a total, net charge of _____ because they have equal amounts of protons and electrons.
3
2
1
0
13
What is the mass number of the following element?
Au
176
197
79
14
True or False? An atom of phosphorus has 15 protons in the nucleus.
False
True
15
What is an isotope?
atom that has a different number of protons, and the same atomic mass
atom that has a different number of neutrons, and the same atomic mass
atom that has a different number of neutrons, and a different atomic mass
atom that has a different number of electrons, and a different atomic mass
16
How can you find the number of protons of an element on the periodic table?
Name
Symbol
Atomic number
Atomic mass
17
What subatomic particle is NOT part of the nucleus?
Electrons
Neutrons
Protons
18
True or False: The outermost orbit for electrons is called the valence shell.
True
False
