Structure of the Atom
Chemistry ⇒ Atomic Structure and the Periodic Table
Structure of the Atom starts at 7 and continues till grade 12.
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Describe the main difference between Bohr's model and Rutherford's model of the atom.
Describe the main features of Rutherford's model of the atom.
Explain why atoms are electrically neutral.
State the difference between atomic number and mass number.
The nucleus of an atom contains which two types of particles?
What is the charge of a neutron?
Which model of the atom is also known as the 'plum pudding model'?
Which scientist discovered the neutron?
The relative mass of an electron is approximately:
(1) 1
(2) 1/1840
(3) 0
(4) 1840
Which of the following best describes an ion?
(1) An atom with equal numbers of protons and electrons
(2) An atom with more protons than neutrons
(3) An atom with unequal numbers of protons and electrons
(4) An atom with no neutrons
Which of the following elements has the atomic number 8?
(1) Nitrogen
(2) Oxygen
(3) Fluorine
(4) Neon
Which of the following is an isotope of hydrogen?
(1) Deuterium
(2) Helium
(3) Lithium
(4) Oxygen
Isotopes of an element have the same number of protons but different number of ______.
The atomic number of an element is equal to the number of ______ in its atom.
The number of neutrons in an atom can be calculated by subtracting the ______ from the mass number.
The sum of the protons and neutrons in an atom is called its ______.
State whether the following statement is true or false: The mass of an atom is concentrated in its nucleus.
True or False: All atoms of the same element have the same number of protons.
True or False: Electrons are found in the nucleus of an atom.
True or False: Isotopes have different atomic numbers.
