WorksheetsElement/PT review
Total questions: 30
Worksheet time: 44mins
Flour, sugar, cocoa, oil, and eggs are mixed together and placed in the oven to make brownies. When the brownies are removed from the oven, they no longer look the original ingredients.
A biological change occurred.
No change occurred.
A physical changed occurred.
A chemical changed occurred.
Which of the following is the symbol for chlorine?
Ch
C
Cl
Ce
Which of the following best describes an electron?
It has no charge and about the same mass as a proton.
It has a negative charge and much less mass than a proton.
It has a positive charge and much more mass than a neutron.
It has a negative charge and about the same mass as a neutron.
The group for Bromine is ___________.
13
12
17
Elements on the periodic table ALL have different atomic masses.
True - same rule for the atomic numbers
False - many elements have the same atomic masses
Carbon has 12 protons.
True
False
Oxygen has _____ protons and electrons.
6
8
15
16
Elements in the modern periodic table are arranged according to their
Atomic number
Oxidation number
atomic mass
nuclear mass
Electrons have different energy levels and orbit the nucleus with an energy level.
Choose the element in Group 2, Period 3.
Boron
Magnesium
Calcium
Aluminum
Which of the following elements has 7 valence electrons?
Bromine
Helium
Beryllium
Aluminum
Which of the following elements is in the same period as phosphorus?
carbon
magnesium
nitrogen
oxygen
Mendeleev's arrangement of the periodic table was in order of increasing ____.
atomic number
atomic mass
neutron number
valence electron number
The one- or two-letter abbreviation of an element on the Periodic Table is called its
symbol
contraction
group
Elements in an element family have similar
atomic symbols
atomic sizes
atomic weights
chemical properties
What is the mass number of silver?
47
108
0
61
Carbon
CA
C
Ca
Cn
Hydrogen
Hy
H
Hr
Hn
Neon
Nn
No
N
Ne
Helium
H
He
HE
Hl
What is the atomic number?
number of protons
number of neutrons
number of electrons
the mass of the atom
How many elements are in the periodic table?
210
118
98
156
The central part of an atom is called the
Electron
Neutron
Proton
Nucleus
How many electrons does this element have?
56
26
82
30
