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Biology Basics
Biology Basics
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Atoms, Molecules, Compounds, Elements, Isotopes, Chemical Bonds, Polarity.
Flashcards
24 cards
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Questions
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Answers
1
In an atom, what circulates the nucleus?
quarks
electrons
protons
neutrons
2
Which of the following is the smallest?
hemoglobin protein
a neutron
hydrogen atom
a grain of salt
3
Which of these elements is not CHNOPS
Sulphur
Nitrogen
Phosphorous
Chlorine
4
What best defines and element?
Atom with a specific number of protons
Atom with a specific number of neutrons
An atom with a set number of electrons
Something that can react chemically
5
Which is a chemical bond where elements share electrons?
a salt bond
covalent
cooperational
ionic
6
Methane CH
4
- has these kinds of bonds.
ionic
hydrogen bonds
polar
covalent
7
How many valence electrons would element Sulphur need to gain to complete it's orbital?
2
6
3
1
8
How many protons would Oxygen have in its nucleus?
6
8
2
Can't say
9
Which of these elements is not CHNOPS
Carbon
Potasium
Hydrogen
Oxygen
10
What charges do electrons have?
negative charge
positive charge
neutral charge
no charge
11
How many valence electrons are needed to complete the first orbital?
6
8
4
2
12
In a compound, when one atom attracts electrons more than another, it due to _____
Electronegativity
Ionic attraction
The charge gradient
δ charges
13
H
2
O has which kinds of bonds between the Hydrogen and the Oxygen (in the molecule)?
Polar
Covalent
Hydrogen
Ionic
14
How many protons would Oxygen-18 (an isotope of oxygen) have in its nucleus?
6
can't tell
8
more than Oxygen-16 (normal oxygen)
15
Sodium and Chlorine bond to create NaCl. Which of the following is true?
The bond is covalent because they share electrons
The Sodium (Na) becomes more negative
The Chlorine (Cl) become more positive
The Sodium (Na) becomes more positive
16
Which of the following is false about polarity?
Polar molecules have opposite charges
Most organic compounds are polar
Water is a polar molecule
There are two types of polarities
17
Which type of polarity is based on the shape of the molecule?
Molecular Polarity
Hydrogen Bonding Polarity
Bond Polarity
Ionic Charge Polarity
18
Elements in row 2 and 3 need ___________ valence electrons to complete their orbitals.
8
6
10
4
19
The polarity of water causes gives it interesting properties. Ability to ____ is one example.
hydrogen bond
evaporate
dissolve non polar compounds
ionic bond
20
Which is a bond where electrons are transferred between elements?
Ionic
Dionic
Transfonic
Covalent
21
What are valence electrons?
electrons in the outer shell
positively charged electrons
neutrons with neutral charges
the most stable electrons
22
How many naturally occurring elements exist on Earth?
110
80
92
98
23
What best defines an Atom?
the smallest unit of a molecule
the core of an element
the largest unit of a compound
the smallest unit of an element
24
How many valence electrons does Carbon have?
6
8
2
4
