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Basic chemistry
Basic chemistry
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The basics you should know for the chemistry of biology. Water, bonding, atoms, and molecules
Flashcards
19 cards
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Practice quiz
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Questions
19
Answers
1
What is an isotope?
An atom with more electrons than the average atom of that element
An atom with more neutrons than the average atom of that element
An atom with equal numbers of protons, neutrons and electrons
An atom with more protons than the average atom of that element
2
Surface tension is the result of cohesion
False
True
3
How many neutrons are in an atom of Mg?
24.31
6
12
8
4
What is this molecule and what kind of bond does it have?
Nitrogen chloride has a polar covalent bond
Sodium hydroxide has a non-polar covalent bond
Nitric acid has a hydrogen bond
Sodium chloride (salt) has an ionic bond
5
An ionic bond is the strongest chemical bond because the atoms share electrons
False
True
6
Water molecules like to hang out with each other because they are hydrophilic
False
True
7
Water...
is a polar molecule
is the universal solvent
is an essential reactant for biological processes
has a high heat capacity
8
Water sticks to surfaces because of adhesion
True
False
9
What is this element?
Calcium
Carbon
Cadmium
Canberium
10
The protons of an atom interact to form molecules
True
False
11
A water molecule is held together by hydrogen bonds
False
True
12
Ionic bonds are created by the transfer of a electrons from one atom to another.
True
False
13
Non polar substances can react with water
True
False
14
A molecule is made up of at least 3 elements
False
True
15
How many protons are in an atom of P?
9
3
15
30.974
16
A solvent is...
A substance that is dissolved
A substance that can dissolve other substances
A substance that has a neutral pH
A substance that releases H+ ions
17
Compounds are composed of 2 or more elements
False
True
18
What makes up an atom?
Electrons
Protons
Neutrons
Megatrons
19
Non polar molecules have balanced charges
True
False
