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WorksheetsThe Atom 1.2/ 4.1 Chemistry
Total questions: 39
Worksheet time: 28mins
Protons are particles ________ the nucleus of an atom.
inside
outside
around
towards
Electrons are atomic particles with a ________ charge
positive
negative
neutral
The following are all examples of matter
air
heat
gold
helium
sound
The building blocks of matter are
atoms
compounds
cells
_________ are particles in the atom's nucleus that have no electric charge.
Protons
Electrons
Neutrons
The atomic particles outside of the atom's nucleus are ____________
protons
electrons
neutrons
Substances made up of only one kind of atoms are
isotopes
compounds
elements
Isotopes are atoms of the same element that have a different number of
protons
electrons
neutrons
Negatively charged particles that move around the atom's nucleus are
protons
electrons
neutrons
Two atoms of the same element that have a different _____________are isotopes of the element.
atomic number
number of electrons
mass number
A difference in the _____________ of atoms mean the atoms are of different elements.
mass number
atomic number
period number
The nucleus of an atom has a _________ charge
positive
neutral
negative
Carbon-14 is an _______ of carbon.
isotope
compound
unit
The mass number of an atom with 12 protons and 12 neutrons is ____________
12
1
24
The atomic number of an atom is equal to the number of __________ in its nucleus.
protons
electrons
neutrons
In atoms with equal number of electrons and protons, there is ___________electric charge
no
positive
negative
Anything that has mass and takes up space is
volume
matter
element
A model of an atom is _______ than the actual atom
identical
smaller
larger
The nucleus of an atom is made up of neutrons and
electrons
chromosomes
protons
Isotopes enable scientist to determine the _________ of ancient objects
age
size
color
Some common substances and their chemical formulas are listed in the chart on the right. Which of these substances are elements?
hydrochloric acid and carbonic acid
oxygen and helium
carbon dioxide and water
water and oxygen
Because copper is a metal, it is
liquid at room temperature
nonreactive with other substances
a poor conductor of electricity
a good conductor of heat
All living and nonliving material is composed of
air
elements
water
soil
The horizontal rows on the periodic table are called
groups
families
periods
atomic numbers
Each vertical column on the periodic table is called a...
group
tower
period
crew
The letter, C, is a ... of carbon.
Name
Nickname
Chemical Symbol
Pseudonym
I am a metal
I am in group 2
I am in period 6
I am…
Mo
Re
S
Ba
I am a nonmetal
I am in period 2
I am in group 16/6A
Ba
Si
Ba
O
Find an element with similar chemical properties to Barium (Ba).
Ca an Ra, because they are in the same group and have similar chemical properties.
Cs and La, b/c they are in the same period number.
Ca and Y, b/c they are 90 degree angle and have similiar properties.
Elements in the same group have the same number of:
protons
neutrons
electrons
How many VALENCE ELECTRONS does Lithium have?
3
1
2
How many VALENCE ELECTRONS does Boron have?
3
5
2
This is a correct dot diagram for neon (Ne)
true
false
How many electrons should sodium, atomic number 11, have around its Lewis dot model?
1
2
3
4
