WorksheetsElectron Config. & Flame Test Practice
Total questions: 28
Worksheet time: 24mins
Type the electron configuration of Be
Which element has the following electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹
Sc
Ca
O
Ti
The arrangement of electrons in energy levels (shells) around the nucleus of an atom is called what?
Ion
Shells
Subshells
Electron configuration
Electron configurations are written in the form of nlˣ. What does the letter n represent?
The number of shells an atom has
The number of electrons contained in a subshell
The subshell letter: s,p,d or f
Spicy nuggets
What is a flame test?
The arrangement of electrons in energy levels (shells) around the nucleus of an atom
It is a test used to determine the identity (or possible identity) of a metal found in a compound.
A charged atom or molecule
Electrons that can be induced to absorb energy and jump to an excited energy state.
How many electrons will be placed in the 2p orbital when writing the electron configuration of sulfur, S?
1
2
6
3
Which of the following diagrams correctly shows the electron configuration of Sulfur, with atomic number 16?
Diagram A
Diagram B
Diagram C
Diagram D
For which element does this orbital diagram represent?
Be
B
C
N
What is wrong with the orbital diagram of nitrogen, N?
The number of electrons is incorrect
The 2s subshell should not be filled yet
The electrons must occupy each empty orbital before pairing up
The spin of the electrons are incorrect
What is wrong with the orbital diagram of sodium, Na?
The 3p orbital must be filled before the 3s orbital
The electrons have the wrong spin
There should only be 10 electrons, not 11
The 3s orbital must be filled before moving on to a new energy level
Beryllium (Be) and magnesium (Mg) do not exhibit flame color. Based on our discussions in class, explain why that is the case.
Be and Mg have electrons that are tightly bound to the nucleus
Be and Mg have electrons that are weakly bound to the nucleus
Be and Mg are in the same period
Be and Mg has 2 shells
What was the flame color of Sr2+ when SrCl2 was heated?
Red
Blue
Green
Orange
What was the flame color of Na+ when NaF was heated?
Green
Blue
Yellow
Orange
For which element does this electron configuration represent? (a)
For which element does this electron configuration represent? (a)
Which metal produces a yellow flame when heated?
Na
Ca
K
Rb
Which metal produces a green flame when heated?
Na
K
Cu
Ba
Type the electron configuration of Li. (a)
Type the electron configuration of K. (a)
When writing electron configurations, which element do you always start with?
Beryllium
Lithium
Helium
Hydrogen
What does the aufbau principle state?
That electrons must occupy the lowest-energy orbital
That electrons sharing an orbital have opposite spins.
That electrons will occupy an empty orbital when it is available in that subshell.
It states that the atomic number is equal to the number of protons in an atom.
What does Hund's rule state?
That the atomic number is equal to the number of protons in an atom.
It states that electrons occupy the lowest-energy orbital.
It states that electrons will occupy an empty orbital when it is available in that subshell.
It states that electrons sharing an orbital have opposite spins.
Write the electron configuration for an atom that has 9 electrons.
(a)
Which subshell will be filled after the 3s subshell?
4s
3p
4p
2p
Which subshell will be filled after the 2s subshell?
2p
3s
4s
1s
Write the electron configuration for an atom that has 8 electrons.
(a)
Which element in the 8th column of the periodic table (shown below) has the largest radius?
Xe
Ar
Rn
He
What is the maximum number of electrons that can occupy the 2nd electron shell?
8
2
6
18
