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Chemistry revision Flashcards | StudBud
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Chemistry revision
Chemistry revision
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Revision of atomic structure, matter, and isotopes
Flashcards
27 cards
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Practice quiz
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Questions
27
Answers
1
In the Lewis dot diagram of Fluorine. What do the dots symbolise?
Number of protons
Number of neutrons
Number of valence electrons
2
How many electrons can fill the 1st shell?
8
1
2
10
3
What is an isotope?
Atoms of the same element with a different number of protons
Atoms of the same element with different mass numbers
4
How many valence electrons are in an atom of nitrogen?
3
4
2
5
5
How many neutrons are in an atom of oxygen?
12
8
6
16
6
How many valence electrons are in an atom of Beryllium?
4
1
3
2
7
How many neutrons are in an atom of Lithium?
7
6
4
3
8
An elements atomic weight/mass shows
Number of protons
Number of neutrons
Number of protons + neutrons
9
What are valence electrons?
Number of electrons in an atoms outer shell
Number of electrons in an atoms inner shell
10
Isotopes have different numbers of
Protons
Neutrons
Electrons
11
What is the charge of an electron?
Positive
Negative
12
How can we calculate the number of neutrons in an atom?
Atomic mass + Atomic number
Atomic number - Atomic mass
Atomic mass - Atomic number
Protons - electrons
13
What are the three components of an atom?
Electrons, neutrons, isotopes
Protons, electrons, neutrons
Isotopes, protons, electrons
Proton, empty space, neutron
14
When ice is out in the sun, what happens?
Evaporation
Condensation
Freezing
Melting
15
How many electrons can fill the 2nd and 3rd shells?
6
8
10
2
16
In which state of matter do molecules move the fastest?
Liquid
Solid
Gas
17
What is the kinetic theory of matter?
Matter is in constant motion
Some matter moves but not all
Only gases and liquids move
18
What is the charge of a proton?
Negative
Positive
19
When water vapor touches a cooler surface, gas --> liquid. This is called
Melting
Freezing
Condensation
Evaporation
20
Which state of matter is shown?
Liquid
Solid
Gas
21
How many protons are in an atom of oxygen?
5
8
6
7
22
Which of the following is an example of an isotope?
O-16 & O-16
N-14 & N-17
O-16 & N-14
23
Which state of matter is shown?
Liquid
Gas
Solid
24
An elements
atomic number
shows
The number of neutrons
Protons + Neutrons
The number of protons
25
Which state of matter is shown?
Gas
Solid
Liquid
26
What happens to particles when heat is added?
Particles move faster
Particles stay the same
Particles move slower
27
What is an element?
Substance composed of a single type of atom
Substance composed of different types of atoms
