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Atoms, Ions, and Molecules

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Biology Quiz on basics of Chemistry (Section 2.1)

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Questions 14

Answers

1
Atoms connected by covalent bonds share
hydrogen ions
pairs of electrons
ionic compounds
carbon and oxygen
2
How do ions form?
Atoms gain or lose electrons.
Atoms combine to make a larger atom.
Two atoms share electrons.
Atoms form covalent bonds.
3
How does an ionic bond form?
Two atoms combine as one.
Atoms share electrons.
Electrons are exchanged between atoms.
Positive and negative ions attract
4
How does an ion become negatively charged?
It gains electrons.
It loses electrons.
5
Which particle determines the properties of an element?
protons
electrons
quarks
neutrons
6
Atoms in molecules share pairs of electrons when they make
ionic bonds
covalent bonds
specific heat
hydrogen bonds
7
What distinguishes one element from another?
The number of protons.
The number of electrons.
The shape.
The number of neutrons.
8
What is the negatively charged particle found in an atom called?
prions
protons
neutrons
electrons
9
What is an example of an element?
Kryptonium
Gold
Neon
Steel
10
An ion is formed when an atom gains or loses
electrons
neutrons
protons
bonds
11
The smallest basic unit of matter is the
cell.
atom.
compound.
molecule.
12
Which phrase best describes atoms?
smallest basic units of matter
positively charged particles
single-celled organism
parts of a nucleus
13
What is a compound?
separate atoms of multiple elements in varying ratios
two atoms of a single element bonded together
a molecule of two oxygen atoms
atoms of different elements bonded in certain ratios
14
Which of the following cannot be broken down by ordinary chemical means?
element
molecule
bond
compound