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WorksheetsUnit 6 lesson 5-7 Review
Total questions: 17
Worksheet time: 9mins
What are elements made up of?
compounds
mixtures
single type of atom
multiple types of atoms
What is the average atomic mass of Beryllium?
4
8
9.012
18.024
Which classification of the periodic table contains elements that have the most similar properties?
periods
groups
metals, nonmetals and metalloids
classifications
what are the horizontal columns on the periodic table called?
rows
periods
groups
families
One atom has the atomic number 15 and the mass number 30. Another atom has an atomic number of 14 and a mass number of 29. What do this two atoms have in common?
they both have 15 protons
they both have 15 nuclei
they both have 15 electrons
they both have 15 neutrons
If an atoms mass number is 120 and its atomic number is 65. How many neutrons does this atom have?
45
120
55
185
if two atoms have the same number of protons are they the same element?
yes
no
How many electrons does a neutrally charged atom have if it has 18 protons and 26 neutrons?
8
26
44
18
If an atom has 3 protons, 3 electrons and 5 neutrons, what is the mass number?
6
3
8
11
Where does most of all the mass of an atom exist?
neutrons
protons
nucleus
electron cloud
where do elements that have metal like qualities exist on the periodic table?
first group
last group
left of the zigzag line
right of the zigzag line?
if you add an electron to a neutral atom, what happens to that atom?
it adds a proton
it becomes a positive ion
it becomes a negative ion
the atomic number increases
What elements lay along the zigzag line?
metalloids
metals
nonmetals
transitional metals
What classification of elements are shiny, malleable and conduct electricity?
nonmetals
metalloids
metals
noble gases
Which one of these is a pure substance?
tap water
table salt
milk
dirt
which one of these answers is a homogeneous mixture?
oil and water
milk
sweet tea
sand
Which type of mixture has the smallest particles?
Colloid
suspension
solution
all particles are the same size
