WorksheetsChemistry 8
Total questions: 15
Worksheet time: 11mins
What is the basic unit of a chemical element?
Compound
Molecule
Atom
Element
What is the atomic number of an element?
It is the number of electrons in an atom.
It is the number of protons in the nucleus of an atom.
It is the sum of protons and neutrons in an atom.
It is the number of electrons in the outermost shell of an atom.
How are the elements organized in the periodic table?
By increasing atomic number
Alphabetically
By chronological discovery
By decreasing atomic mass
What information does the chemical symbol of an element provide us?
Indicates the number of electrons in the valence shell of the element
Provides information about the atomic identity of the element, including its atomic number and unique abbreviation.
Describes the density of the element in its solid state
Provides information about the melting temperature of the element
What is the number of protons in a hydrogen atom?
3
2
4
1
What does the atomic number of an element represent?
The weight of the atom in grams
The amount of neutrons in an atom
The number of electrons in an atom
The amount of protons in the nucleus of an atom.
What is the first element in the periodic table?
Hydrogen
Oxygen
Carbon
Helium
What is the chemical symbol for oxygen?
Oxygen
C
N
H
How many electrons does a sodium atom have in its outer shell?
4
2
3
1
What property increases gradually as you move from left to right in the periodic table?
Atomic mass
Atomic radius
Atomic number
Electronegativity
What is the most abundant element in the Earth's crust?
Iron
Carbon
Hydrogen
Oxygen
What is the atomic number of carbon?
7
8
5
6
What group of elements is found in the central part of the periodic table?
Group 2 (IIB)
Group 5 (VB)
Group 7 (VIIB)
Group 4 (IVB)
What is the chemical symbol for iron?
Io
Hr
Ir
Iron
What determines the position of an element in the periodic table?
Number of electrons
Number of protons
Masa atómica
Number atómico
