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Atomic Structure Review
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11-The chemical symbol of magnesium is ....................
Mg
9-Number of neutrons is equal to mass no. - atomic no.
True
7-The _________ equals the number of protons in an atom of that element
atomic number
6-The dense, positively charged mass located in the center of the atom.
nucleus
5. What is the mass number of aluminum  (Al)?
27
4. Atoms of the same element must always have the same number of _________
protons
3- How many neutrons are in an atom of sodium (Na)? (Remember : Neutrons no. = Mass no. - Atomic no. )
23 - 11 = 12
2. How many electrons are in an atom of carbon (C)? (Remember : Atomic Number = no. of Protons or no. of Electrons)
6
Are the number of proton and electron in the neutral atom always the same ?
Yes
Atomic number is equal to ...
proton
Atomic mass is made up by ...
proton and neutron
Where is the electron located ?
Shell
Where is the position of proton and neutron?
nucleus
What is symbol of C stand for
Carbon
What is symbol of K stand for ?
Potassium
What is symbol of Ca stand for ?
Calcium
Which letter is pointing to the electron cloud?
D
Which letter is pointing to the neutrons?
B
Which letter is pointing to the protons?
A
Which letter is pointing to the electrons?
C
Which letter is pointing to the nucleus?
E
What is located at position C?
proton
What is located at position B?
neutron
What is located at position A?
electron
What particle is found in the energy rings around an atom?
electrons
Electrons are found outside the nucleus. What is the name of their location?
electron rings, energy rings, atomic orbitals, energy shells, electron shells, etc.
What is the center of the atom called?
nucleus
Which is bigger, an electron or a neutron?
neutron
Which is bigger, a proton or an electron?
proton
Which particle doesn't count towards the mass of an atom?
electrons
Which 2 elements have the same mass?
protons and neutrons
What is the mass of a neutron?
1 AMU
What is the mass of a proton?
1 AMU
These are found inside the nucleus.
protons and neutrons
These are found outside the nucleus.
electrons
Which particles gives each element its unique identity?
protons
Which 2 particles have "equal but opposite" charges?
protons and electrons
What is the charge of an electron?
negative
What is the charge of a neutron?
neutral, zero, none
What is the charge of a proton?
positive
Where are electrons found?
in the electron cloud
Where are neutrons found?
in the nucleus
Where are protons found?
in the nucleus
T or F. Carbon-14 and Nitrogen-14 are isotopes of each other because their mass numbers are the same.
False
T or F. Oxygen-18 and Fluorine-19 have the same number of neutrons.
True
How many protons, electrons, and neutrons does a neutral atom with an atomic number of 50 and a mass number of 120 contain?
50 protons, 50 electrons, 70 neutrons
How many neutrons are in the nucleus of iodine-131?
78
How many neutrons does an atom with an atomic mass of 9 and an atomic number of 5 contain?
4
How are ions formed?
By adding or taking away an electron from an atom
By knowing the number of protons a neutral atom has, you should be able to determine
 
two of these
 
the number of neutrons in the neutral atom
 
the number of electrons in the neutral atom
 
the name of the atom
Which one of the following statements about atomic structure is false?
 
Proton & neutron number is always the same in a neutral atom
 
An atom is mostly empty space.
 
Almost all of the mass of the atom is in the nucleus
 
Protons and neutrons in the nucleus are very tightly packed
The number of valence electrons for elements in Group 16 is _____.
6
What does the number 84 in Krypton-84 represent?
the mass number
Isotopes of the same element can differ in
mass number/number of neutrons
Which scientist discovered the electron?
Thomson
An element has an atomic number of 80. How many protons and electrons are in a neutral atom of this element?
80 protons and 80 electrons
What particles form the nucleus of an atom?
protons and neutrons
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