Font size
WorksheetsBasic of atoms
Total questions: 20
Worksheet time: 12mins
What is an atom?
the smallest part into which an element can be divided.
Is mixture of compounds and elements.
Is an electron
Is a compound
Which subatomic particles identifies the atom?
Proton
Neutron
Electron
Subatomic particles outside nucleus with negative charge and1/2000 amu of mass?
Ion
Neutron
Electron
Proton
Subatomic particles that given an atom it's identity?
Quark
Proton
Electron
Neutron
Area outside(surrounding) the nucleus of atoms?
Electron cloud
Orbit
Shell
Electron
Which statements are true about the nucleus?
Center of the atom
Contains only protons
Contains electrons and protons
Very dense
Contains protons and neutrons
Which of the following best describes an atom?
Proton and electrons grouped together
A core of electrons and neutrons surrounded by proton
Proton and neutrons grouped together
A core of protons and neutrons surrounded by electrons
All atoms of an element have the same number of
Protons
Neutrons
Atomic mass
Atomic number
How do you find the number of neutrons in atom?
Add the atomic mass to atomic number
By the atomic mass
By the atomic number
Subtract the atomic number from atomic mass
Are two atoms of the same element identical?
Yes
No
Name this model?
Modern/Quantum
Bohr
Democritus
Plum pudding
Whose atomic model is this?
Bohr
Democritus
Rutherford
Thomson
Who proposed that matter was formed of small indivisible particles?
Dalton
Thomson
Democritus
Chadwick
Which Greek philosopher first spoke about the idea of an atom?
Democritus
Dalton
Thomson
Rutherford
Which scientist is best known for his 'plum pudding' model?
J. J Thomson
Ernest Rutherford
John Dalton
Democritus
If an atom has 12 protons which of the following must it have to be considered a neutral atom?
12 neutrons
24 protons
12 electrons
24 protons and neutrons
How many Valence electrons are there in this atom?
3
13
8
2
What you mean by valence?
Valency is the mass of an atom
The number of neutrons and electrons
The number of shells
Is combining power of an element
An atom with atomic number 6 would have how many protons?
Cannot be determined
12
3
6
What is the atomic mass of 'F'?
9
19
17
18
