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Atoms, Ions, and Molecules KW
Atoms, Ions, and Molecules KW
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Biology Quiz on basics of Chemistry (Section 2.1)
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Answers
1
How do ions form?
Two atoms share electrons.
Atoms form covalent bonds.
Atoms gain or lose electrons.
Atoms combine to make a larger atom.
2
Atoms connected by covalent bonds share
hydrogen ions
pairs of electrons
ionic compounds
carbon and oxygen
3
What is an example of an element?
Gold
Neon
Kryptonium
Steel
4
Which phrase best describes atoms?
positively charged particles
smallest basic unit of matter
parts of a nucleus
single-celled organism
5
Which particle determines the properties of an element?
neutrons
protons
electrons
quarks
6
If an element has lost an electron and is now an positively charged ion, it is called a
dogion
positron
cation
anion
7
The smallest basic unit of matter is the
molecule.
compound.
cell.
atom.
8
An ion is formed when an atom gains or loses
neutrons
electrons
protons
bonds
9
Elements in a group with the same valence electrons have the same
protons
band name
number of shells
chemical properties
10
How does an ion become negatively charged?
It gains electrons.
It loses electrons.
11
How does an ionic bond form?
Two atoms combine as one.
Positive and negative ions attract
Atoms share electrons.
Electrons are exchanged between atoms.
12
The correct number of valence electrons in carbon is
3
8
1
4
13
What distinguishes one element from another?
The number of protons.
The number of neutrons.
The shape.
The number of electrons.
14
If you were to draw the dot structure of fluorine how many dots would be around it
7
8
1
11
15
What is the negatively charged particle found in an atom called?
prions
electrons
neutrons
protons
16
If the electrons in a covalent molecule are shared unequally, it is what type of bond?
polar covalent
nonpolar covalent
James
ionic
17
Atoms in molecules share pairs of electrons when they make
ionic bonds
hydrogen bonds
covalent bonds
specific heat