WorksheetsThe atom
Total questions: 30
Worksheet time: 23mins
An atom has an atomic number of 15 and a mass number of 31. How many protons are there in the atom?
15
31
16
47
Which part of the atom has no charge
Neutrons
Electrons
Protons
They all do
1s22s22p63s2
1s22s22p63s23p64s23d10
The third energy level can hold at most how many electrons?
2
8
18
32
Which area on the periodic table represents the electrons in the "d" sublevel?
Alkali Metals
Families 3-8
Lanthanides and actinides
transition elements
How many valence electrons does phosphorus have and in which sublevel(s) are they found?
3; p
5; s and p
2; s
3; s and p
How many electrons at most are in the 4f sublevel?
10
8
18
14
Choose the correct shortcut configuration for iodine.
[Ar]4s24d104p5
[Kr]5s24d105p5
[Xe]5s25d105p5
none of the above
How many valence electrons are in this element? AND identify the element.
1s22s22p63s23p64s23d104p65s24d105p66s25d14f145d2
11; Hf
2; Ba
3; La
2; Ta
Nickel-59 has how many neutrons?
30
31
32
33
Rubidium has two common isotopes, 85Rb and 87Rb. If the abundance of 85Rb is 72.2% and the abundance of 87Rb is 27.8%, what is the average atomic mass of rubidium?
85.468 amu
37 amu
85.6 amu
86.4 amu
What is the color of the light that sodium compounds give off?
Green
Red
Violet
Yellow-orange
What kind of elements can be identified by using a flame test?
Metals
Non-metals
Both metals and non-metals
Neither metals nor non-metals
Using the configuration below, give is the element and the number of valence electrons it has?
[Xe] 6s2 4f14 5d9
Cd - 2 valence
Cd - 9 valence
Hg - 2 valence
Hg - 14 valence
Which element does NOT match its symbol
Argon - Ar
Lead - Pb
Fluorine - F
Manganese - Mg
How many electrons can shell 4 (n=4) hold?
8
18
32
36
