Using the table below, what color would you expect to see for a flame test of a sample of lead (II) oxide, PbO?
Question 11
11.
Question 12
12.
How many valence electrons do halogens have?
Question 13
13.
Question 14
14.
How many orbitals are in the 1p subshell of an oxygen atom?
5
0
6
4
3
How many valence electrons does this element have?
10
0
4
8
6
How many unpaired electrons does an atom of Nitrogen have?
1
4
0
3
2
What element is shown below?
Sb (Antimony)
Nb (Niobium)
V (Vanadium)
As (Arsenic)
Which of the following elements is paired with the CORRECT noble gas notation?
Iodine - [Kr] 5s2 4d10 5p5
Phosphorus - [Ar] 3s2 3p3
Beryllium - [Ne] 2s2
Arsenic - [Ar] 4s2 4p3
Scandium - [Ar] 4s3
An ion of nitrogen with a charge of -3 would be isoelectronic with
Helium (He)
Beryllium (Be)
Neon (Ne)
Argon (Ar)
Which of the following elements will have similar chemical properties to oxygen?
Be
N
Cl
He
Te
Of the elements listed below, which has the largest atomic radius?
Na
Se
Ca
K
S
Of the elements listed below, which has the lowest ionization energy?
Sc
Sr
Mg
C
F
Electrons emit energy in the form of light at the precise moment when they
jump from the ground state to an excited state.
fly off of an atom during the process of ionization.
reach the highest possible energy level.
fall from an excited state to the ground state.
Which of the following statements is TRUE?
Helium is the smallest element and has the lowest ionization energy.
Helium is the smallest element and has the highest ionization energy.
Helium is the largest element and has the highest ionization energy.
Helium is the largest element and has the lowest ionization energy.
X-ray diffraction was used on unknown Element Z to find there are about 159 pm (picometers) between the center of Element Z's nucleus and its outermost electrons. The same measurement was done on 5 other known elements and that data was recorded in the table below. Using the table, which element could fit Element Z's description above?