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Chemistry Review (atoms and compounds) Flashcards | StudBud
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Chemistry Review (atoms and compounds)
Chemistry Review (atoms and compounds)
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A review of the periodic table, atoms and compounds.
Flashcards
23 cards
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Practice quiz
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Questions
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Answers
1
What does 'valence' mean?
shell
first
middle
last
2
The law that says that matter can't be created or destroyed is called what?
the law of the universe
the law of matter and all things that be
the law of conservation of mass
the law of superposition
3
The purpose of chemical bonding is for an atom to get ____ electrons in the valence shell.
10
6
8
4
4
Which of the following is NOT a rule of chemical bonding?
Follow the formula
All atoms must fill their valence shells.
At least one atom must fill its valence shell.
No single/free electrons
5
One atom from the Oxygen group would combine readily with one atom from:
the noble gases
the alkaline earth metals
the boron group
the alkali metals
6
One atom from the Oxygen group would combine readily with two atoms from the:
noble gases
alkaline earth metals
alkali metals
the boron group
7
Group two is called:
Alkaline Earth Metals
Noble gases
Carbon group
Alkali metals
8
Oxygen has ___ electrons in its valence shell.
8
6
4
2
9
Which of the following describes how to find the number of neutrons in an atom?
add the protons and electrons together
subtract atomic mass from atomic number
subtract atomic number from atomic mass
add atomic number and atomic mass
10
True or false: Hydrogen would combine with helium during chemical bonding.
True
False
11
An atom has an atomic number of 19 and a mass number of 39. Which is true?
The atom has 20 protons and 19 neutrons.
The atom has 19 protons and 20 neutrons.
The atom has 19 protons and 19 neutrons.
The atom has 20 protons and 20 neutrons.
12
Horizontal rows on the periodic table are called:
periods or familes
periods or shells
groups or families
groups or periods
13
One element from the Oxygen group would readily combine with one atom from the:
Alkali metals
Noble gases
Alkaline Earth metals
Boron group
14
How many electrons can the 3rd shell of an atom hold?
32
8
64
18
15
Group #7 is known as the:
Alkaline earth metals
Halogens
Alkali metals
Noble gases
16
Which atom is show below?
lithium
carbon
potassium
hydrogen
17
Which group of atoms is chemically stable & will not combine unless forced to?
Carbon group
Alkali metals
Noble gases
Transition elements
18
When balancing equations, I can only add:
you cannot add either a subscript or a coefficient
a coefficient
a subscript
you can add both a subscript and a coefficient
19
What must be present in order for two atoms to bond?
a pair of electrons from each atom
a filled valence shell
no electrons in a spot
a single electron from each atom
20
Which two are the MOST reactive groups on the periodic table?
Noble gases and halogens
Alkali metals and halogens
Boron group and nitrogen group
Alkali metals and alkaline earth metals
21
The group number of an atom tells me:
the number of shells the atom has
the number of electrons in the valence shell of the atom
the number of protons & electrons the atom has
the number of protons plus neutrons in the atom
22
Which subatomic particle is negatively charged?
electrons
protons and electrons are both negatively charged
protons
neutrons
23
The beginning substances in a chemical reaction are called the:
coefficients
subscripts
reactants
products
