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WorksheetsMilburn- Unit 3 Assessment
Total questions: 22
Worksheet time: 11mins
The nucleus of the atom is a positively charged region at the center of an atom, which consists of protons and neutrons.
True
False
Consider two atoms: one with 3 protons and one with 4 protons. Which statement is true considering the identities of the elements?
One must know the numbers of electrons to know if they are different elements
The atoms of of the same element
The atoms must be of different elements
One must know the numbers of neutrons to know if they are different elements
What makes an atom electrically neutral?
There are many more electrons than either protons or neutrons
Protons and electrons are replaced by neutrons
There are equal numbers of protons and electrons
There are far more neutrons than electrons
Which of the following is the correct electron configuration for Neon (Ne)?
1s² 2s² 2p⁶
1s² 2s² 2p⁶ 3s² 3p⁶
1s² 2s² 6p2
1s1 2s2 2p2
Where are the electrons located in an atom?
The location of the electrons depends on the specific type of atom
Both inside and outside the nucleus
Outside the nucleus only
Inside the nucleus only
As an electron moves further away from the atom’s nucleus, its energy ______.
Decreases
Fluctuates randomly
Increases
First increases then decreases
The outermost electrons in a given atom are called what?
Ionic electrons
Conditional electrons
Free electrons
Valence electrons
To attain a stable octet, the number of electrons gained, lost, or shared must make up the difference between the ____________ of an atom and that of the nearest noble gas on the periodic table.
Valency
Excited state
Ground state
All of the above
Aluminum has...
13 protons
13 atomic mass
13 electrons
13 atomic number
The number of valence electrons _____ as we go down a group
No answer choice
Increases
Decreases
Remains the same
In the formation of a molecule, only the outer-shell electrons are involved, and they are known as valence electrons.
True
False
Electrons are usually found in orbitals.
True
False
What are the shapes of the s and p orbitals?
S orbitals are spherical and p orbitals are planar
S orbitals are shaped like dumbbells and p orbitals are spherical
S orbitals are spherical and p orbitals are shaped like dumbbells
Both s and p orbitals are spherical
The atomic number of an element is equal to _____________.
The number of protons
The number of protons plus the number of electrons
The number of neutrons plus the number of protons
The number of neutrons
During chemical reactions, what happens to the atoms of an alkali metal?
They share electrons with other atoms
They gain electrons
They lose one electron
They lose more than one electrons
What is notable about the elements that are in the same group on the periodic table?
Similar physical properties
Same number of principal energy levels
Same number of energy sublevels
Similar chemical properties
Which correctly orders the halogens from most reactive to
Fluorine > bromine > chlorine > iodine
Iodine > bromine > chlorine > fluorine
Chlorine > iodine > fluorine > bromine
Fluorine > chlorine > bromine > iodine
How many columns are there in the s block of the periodic table?
Three
Two
Five
Four
In the periodic table, elements are organized according to their _______.
Size
Atomic number
Color
Shape
The number of each period in the periodic table represents the number of ______.
Energy levels containing electrons
Electrons in each energy level
Protons plus neutrons in the nucleus
Protons in each energy level
_________ usually have one to three electrons in their outer shell.
Metals
Nonmetals
Metalloids
None of the above
How many protons are in the nucleus of the element with the symbol O?
8
12
10
6
