WorksheetsS1 Unit 1 Review
Total questions: 17
Worksheet time: 14mins
The nucleus of an atom contains which subatomic particles?
protons and electrons
protons and neutrons
electrons and neutrons
protons, electrons, and neutrons
What is the average mass of this element?
1s22s22p63s23p64s23d10
Which electron configuration belongs to a Chloride (Cl-) ion?
1s2 2s2 2p6 3s2 3p5
1s2 2s2 2p6 3s2 3p6
1s2 2s2 2p6 3s2 3p7
1s2 2s2 2p6 3p7
When an electron transitions from a low energy level to a high energy level, the electron...
absorbs energy and moves away from the nucleus
emits energy and moves closer to the nucleus
absorbs energy and moves closer to the nucleus
emits energy and moves away from the nucleus
When an electron transitions from a high energy level to a low energy level...
the electron emits light of a specific wavelength and moves closer to the nucleus
the electron emits light of a specific wavelength and moves away from the nucleus
the electron absorbs energy and moves away from the nucleus
the electron emits light of a random wavelength and moves closer to the nucleus
How many protons does this isotope of titanium have?
22
26
48
70
How many neutrons are in an atom of carbon-14?
6
8
10
14
USE THE PERIODIC TABLE
How many valence electrons does Phosphorus have?
31
5
15
4
USE THE PERIODIC TABLE
Find the element that has 5 Valence Electrons and 4 energy levels.
Arsenic - As
Selenium - Se
Calcium - Ca
Vanadium - V
Why is the element sodium have a charge of zero?
There are 12 neutrons.
It has 11 p+ and 11 e-.
It has 11 p+ and 10 e-.
Knowledge Check:
Why does Chlorine (Cl) become a -1 charge?
Cl donates an e-, so it now has 1 less negative (-) charge.
Cl accepts an e-, so it now has 1 more negative (-) charge.
Solve the nuclear fusion reaction 42He+21H→
63Li
63C
103Li
103Ne
