WorksheetsAtoms, Elements & the Periodic Table
Total questions: 24
Worksheet time: 12mins
The atomic number of an atom identifies the number of ____ in an atom.
protons
neutrons
electrons
protons and neutrons
How many electrons are in an atom that 12 protons and 13 neutrons?
1
12
13
25
The nucleus of an atom contains
electrons only.
electrons and neutrons.
protons only.
protons and neutrons.
If an ion (charged atom) contain 3 protons, 4 neutrons and 2 electrons, what is the mass number of the atom?
3
4
7
9
The vertical columns in the periodic table are called
groups or families.
transition groups.
columns.
periods.
The horizontal rows in the periodic table are called
groups.
families.
periods.
transition groups.
The number of neutrons in an atom can be determined by taking
atomic number minus atomic mass number
atomic mass number minus isotope number
atomic mass number minus atomic number
electron number minus atomic number
The periodic table shows that Selenium has 34 protons. This means that a selenium atom also has
34 neutrons.
34 electrons.
an atomic number of 17.
more electrons than protons.
Metals are located on the _______ of the periodic table.
staircase line
left side
right side
top 3 rows
Nonmetals are located on the _____ of the periodic table.
right side
left side
bottom 4 rows
staircase line
Most of the elements in the periodic table are
metals and solid at room temperature.
metals and liquids at room temperature.
nonmetals and solid at room temperature.
nonmetals and gases at room temperature.
The metalloids are located ______ on the periodic table.
on the right side
on the left side
along the staircase line
in the lower middle section
All of the following describe the Group 8 elements EXCEPT
they are all gases at room temperature
they all have a full number of valence electrons
they are known as the noble gases
they form strong compounds with hydrogen and the Group 1 elements
The most reactive elements on the periodic table are located in
Groups 3B-12B.
Groups 1A and 7A.
the transition metals.
the lanthanides and actinides.
Metals can be differentiated from nonmetals since most metals are
insulators.
mostly liquids and gases at room temperature.
conductors of heat and electricity.
dull in color.
On the periodic table, the Period number tells us
the number of valence electrons in the atoms.
the number of electron shells in the atoms.
the properties of all the atoms in that period.
the number of neutrons in the atoms.
Which element would be dull in color, brittle and not a good conductor of electricity?
Gold
Silver
Bromine
Sodium
All of the following are true of the Alkali metals EXCEPT
they are the group 1A elements.
they contain one valence electron.
they are highly reactive metals.
they are all liquids or gases at room temperature.
Which of the following is TRUE of the element shown here?
the element belongs in group 6A
the element has a full valence of electrons
the element is a solid at room temperature
the element will form a strong compound with the Group 1A elements
If oxygen (O) has 6 valence electrons, how valence electrons does selenium (Se) have?
4
5
6
8
Which answer correctly describes the picture?
electrons are green, protons are purple, and neutrons are blue
electrons are purple, neutrons are green, and protons are blue
electrons are blue, neutrons are purple, and protons are green
you can't tell which particles are which color in this picture
Which of the following would be the most reactive element?
Chromium (Cr)
Astatine (At)
Phosphorus (P)
Chlorine (Cl)
Bromine has an atomic number of 35 and a mass number of 80. How many neutrons are in a bromine atom?
35
45
80
115
Which group of elements contains a metal, a nonmetal and a metalloid?
V, Ar, O
Na, As, Mo
Ba, Ni, Br
Mg, Si, S
