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Atoms & the Periodic Table
Atoms & the Periodic Table
25 terms
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Atoms and Elements Basics
Flashcards
25 cards
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Practice quiz
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Questions
25
Answers
1
The nucleus of an atom consists of
protons, neutrons, and electrons
electrons
neutrons
protons and neutrons
2
How many neutrons does copper have?
65
35
31
29
3
On the periodic table, the horizontal rows are called __________.
Periods
Atomic numbers
Atomic mass
Groups
4
How many electrons does copper have?
37
33
64
29
5
The three basic components of an atom are...
protons, neutrons, and ions
protons, neutrons, and elements
protons, neutrons, and electrons
6
The name of the scientist that conducted the Gold Foil Experiment?
Bohr
Rutherford
Dalton
Democritus
7
What is the most abundant element in the universe?
helium
oxygen
helium
hydrogen
8
In a Bohr diagram, the 1st energy level will hold a maximum of ________ electrons.
6
2
4
8
9
A single proton has what electrical charge?
no charge
positive charge
negative charge
10
Who organized the periodic table by atomic masses?
Mosley
Rutherfor
Mendeleev
Bohr
11
Carbon-12 and Carbon-14 are examples of
isomers
neutrons
nuclei
isotopes
12
The sum of the protons and neutrons in the nucleus
atomic number
amu
isotope
atomic mass
13
Name of the guy who first proposed that matter is made of indivisible particles called atoms?
Bohr
Rutherford
Thomson
Democritus
14
Atoms of the same element that have equal number of protons + differ in the neutrons are called
isotopes
atoms
compounds
elements
15
What charge do neutrons hold?
Poitive
Negative
Valence
No charge
16
The atomic number of an atom is
the number of electrons
the number of protons
the number of protons and the neutrons
the number of neutrons
17
An atom with an atomic number of 16 means it has
16 protons
16 neutrons
8 neutrons
8 protons
18
The electrons on the outermost energy level are called __________________.
independent electrons
secondary electrons
responding electrons
valence electrons
19
Adding a neutron to an atom changes the
atomic number
oxidation number
atomic mass
number of electrons
20
The period an atom belongs to, tell us
how many neutrons an atom has
how many electron clouds an atom has
number of protons an atom has
the number of valence electrons
21
Removing an electron from an atom changes the
the mass number
oxidation number
number of protons
atomic number
22
How many electron clouds does copper have?
1
4
2
3
23
How many protons does copper have?
63
29
31
30
24
What elements are the most reactive?
noble gases
halogens
alkaline earth metals
alkaki metals
25
Electrons are usually found
in atomic nucleus
outside the nucleus in the electron cloud
either in the nucleus or around it; they roam around
