Atomic Numbers and Electron Configuration Assignment and Quiz

Use the periodic table to identify the element indicated by each electron configuration by typing in the chemical symbol for the element.

1s22s22p6: Ne 1s22s22p63s23p3: P 1s22s22p63s23p64s1: K 1s22s22p63s23p64s23d8: Ni 1s22s22p63s23p64s23d104p65s24d3: Nb

Match each set of quantum numbers to the correct subshell description by typing in the correct number. 1: n = 2, l = 0 2: n = 3, l = 2 3: n = 1, l = 0 4: n = 2, l = 1 5: n = 4, l = 3

2p: 4 3d: 2 2s: 1 4f: 5 1s: 3

Which diagram shows a pair of electrons that have opposite spins?

A

Which is the electron configuration for bromine?

A - 1s22s22p63s23p63d104s24p5

Use the periodic table to answer the questions below. Which diagram shows the correct electron configuration for nitrogen (N)? Which diagram shows the correct electron configuration for fluorine (F)?

B A

Consider the model of the nitrogen atom. mc023-1.jpg Which electron configuration matches this model?

B - 1s22s22p3

Consider the electron configuration. Which element has this electron configuration?

chlorine

Each atom of an element has the following electron configuration. 1s22s22p63s23p64s23d104p65s24d105p5 What is the name of the element?

iodine

For the n = 3 electron shell, which of the following quantum numbers are valid? Check all that apply.

l = 0 m = -2 m = 2

Which of the following sets of quantum numbers describe valid orbitals? Check all that apply.

n = 1, l = 0, m = 0 n = 3, l = 0, m = 0 n = 5, l = 4, m = -3

Consider the model of a sodium atom. mc015-1.jpg Which feature does the model show accurately?

the distribution of electrons in different shells

Type in the maximum number of electrons that can be present in each shell or subshell below. n = 5 shell: n = 2 shell: n = 2, l = 0 subshell: n = 2, l = 1 subshell: 3d subshell: 2s subshell: 5f subshell:

n = 5 shell: 50 n = 2 shell: 8 n = 2, l = 0 subshell: 2 n = 2, l = 1 subshell: 6 3d subshell: 10 2s subshell: 2 5f subshell: 14

Which characteristic is given by the principal quantum number?

orbital size

Use the periodic to fill in the numbers in the electron configurations shown below. B: 1s2 2sA2pB Na: 1s22sC2pD3sE

A = 2 B = 1 C = 2 D = 6 E = 1

Two representations of the distribution of electrons in the potassium atom are shown. Which model is useful in showing the reactivity of potassium?

Both models because each shows an electron in the outermost shell.

The electron configuration for aluminum (Al) is shown below: 1s22s22p63s23p1 Which diagram shows the correct distribution of electrons in the electron shells of an aluminum atom?

C

Which is the electron configuration for boron?

D - 1s22s22p1

Which is the electron configuration for zinc?

D - 1s22s22p63s23p63d104s2

Identify one disadvantage to each of the following models of electron configuration: Dot structures Arrow and line diagrams Written electron configurations Type in your answer below.

Dot structures do not show the distribution of electrons in orbitals and take up a lot of space. Arrow and line diagrams take up a lot of space and make it difficult to count electrons. Written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

Identify one advantage to each of the following models of electron configuration: Dot structures Arrow and line diagrams Written electron configurations Type in your answer below.

Dot structures make it easy to count electrons and they show the number of electrons in each electron shell. Arrow and line diagrams show the spin of electrons and show every orbital. Written configurations require minimal space and show the distribution of electrons between subshells.