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Atoms, Ions, and Molecules
Atoms, Ions, and Molecules
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Biology Quiz on basics of Chemistry (Section 2.1)
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1
What is a compound?
a molecule of two oxygen atoms
separate atoms of multiple elements in varying ratios
two atoms of a single element bonded together
atoms of different elements bonded in certain ratios
2
Lipase is an example of a
protein
lipid
enzyme
nucleic acid
3
The smallest basic unit of matter is the
cell.
molecule.
atom.
compound.
4
How do ions form?
Atoms gain or lose electrons.
Two atoms share electrons.
Atoms form covalent bonds.
Atoms combine to make a larger atom.
5
Atoms connected by covalent bonds share
ionic compounds
carbon and oxygen
pairs of electrons
hydrogen ions
6
Which particle determines the properties of an element?
neutrons
protons
quarks
electrons
7
Which phrase best describes atoms?
single-celled organism
positively charged particles
parts of a nucleus
smallest basic units of matter
8
Which of the following cannot be broken down by ordinary chemical means?
bond
compound
element
molecule
9
How does an ion become negatively charged?
It gains electrons.
It loses electrons.
10
Lowers activation energy
Reactants
Lipids
Enzymes
Bond Energy
11
What is an example of an element?
Steel
Gold
Neon
Kryptonium
12
What is the negatively charged particle found in an atom called?
electrons
neutrons
prions
protons
13
An ion is formed when an atom gains or loses
electrons
bonds
neutrons
protons
14
The variables that DO NOT change in an experiment are called
dependent variables
independent variables
constants/controls
observations
15
How does an ionic bond form?
Electrons are exchanged between atoms.
Two atoms combine as one.
Atoms share electrons.
Positive and negative ions attract
16
Atoms in molecules share pairs of electrons when they make
hydrogen bonds
ionic bonds
covalent bonds
specific heat
17
What distinguishes one element from another?
The number of electrons.
The shape.
The number of protons.
The number of neutrons.
