What is the subatomic particle that holds a positive charge?
Nucleus
Electron
Neutron
Proton
Which particle contributes to an atom's mass but holds no electric charge?
Neutron
Photon
Electron
Proton
How can you identify the number of protons in an atom?
By its atomic mass
By its group number
By its atomic number
By its period number
What properties characterise the elements in group 1 of the periodic table?
They are alkaline earth metals and react with halogens.
They are noble gases and are inert.
They are alkali metals and are highly reactive.
They are halogens with poor electrical conductivity.
Why do group 18 elements rarely engage in chemical reactions?
They don’t have sufficient energy levels.
They have full electron shells.
They lack protons.
They have no neutron.
Which group in the Periodic Table contains the Halogens?
Group 2
Group 1
Group 17
Group 18
How many neutrons does an atom of Carbon have?
6 neutrons
8 neutrons
12 neutrons
7 neutrons
What is the number of neutrons in an atom of Oxygen?
7 neutrons
8 neutrons
6 neutrons
16 neutrons
Which electron configuration represents lithium?
1 electron in the first level
3 electrons in the first level
1 electron in the first, 2 in the second
2 electrons in the first level, 1 in the second
Choose the correct electron configuration for the boron element:
2 electrons in the first, 2 in the second
3 electrons in the first, 2 in the second
5 electrons in the first level
2 electrons in the first level, 3 in the second
What information does the atomic number of an element represent?
Atomic weight
Number of neutrons
Number of electrons
Number of protons in the nucleus
How do you determine the number of electron shells in an element?
By its group on the table
By its period on the table
By its atomic mass
By its atomic number
Where are metals generally located on the periodic table?
On the right side
On the bottom side
On the top side
On the left side
Where are nonmetals generally located on the periodic table?
On the top side
On the left side
On the bottom side
On the right side
What does 'staircase line' (metalloids) on the periodic table typically separate?
Different atomic masses
Metals from nonmetals
Gases from solids
Elements in the same period
Are halogens - metals, nonmetals or metalloids?
None of the above
Metalloids
Nonmetals
Metals
Which of the following statements are true?
Individual atoms can be seen with the naked eye.
The nucleus of an atom contains protons and neutrons.
Protons are located outside the nucleus of an atom.
Electrons are the same size as protons.
If an atom is neutral and has six electrons, the nucleus of this atom must contain ____ protons.
five
eight
six
seven
Which model represents the correct way to draw the element helium?
Diagram A because the neutrons belong in the nucleus.
Diagram B because the protons belong in the nucleus.
Diagram C because the electrons surround the nucleus.
None of the diagrams above are correct.
What is the atomic number of Neon (Ne)?
18
22
20
10
What is the atomic mass of Carbon (C)?
6 amu
12.01 amu
24.02 amu
6.01 amu
Sarah is drawing a Bohr Model of the element Beryllium. In her model, she drew 2 electrons in the first energy level and 3 electrons in the second energy level. What did she do wrong?
Sarah put only 2 electrons on the first level when she should have put 4.
Sarah put only 3 electrons on the second level when she should have put 4.
Sarah used the neutron number instead of the electron number.
Sarah used the proton number instead of the electron number.
Elements are composed of atoms, such as the elements magnesium and chlorine. How do the structures of these two elements contrast (different)?
Magnesium:
protons = 12
electrons = 12
neutrons = 12
Chlorine:
protons = 17
electrons = 17
neutrons = 18
Chlorine have a greater mass than magnesium.
The nucleus of chlorine has more protons and neutrons than magnesium.
Magnesium is a metal while chlorine is a nonmetal.
All the above are differences of the two elements.
Elements are composed of atoms, such as the elements magnesium and chlorine. How do the structures of these two elements compare (alike)?
Magnesium:
protons = 12
electrons = 12
neutrons = 12
Chlorine:
protons = 17
electrons = 17
neutrons = 18
The elements have different structures, but the same mass.
The elements are made up of the same subatomic particles just different amount.
They both have the same atomic number.
Their atoms are completely identical in every way.