Multiple Choice
An electron and a proton are fixed at a separation distance of 1.0 nm. What is the magnitude of the electrostatic force between them?
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- 1. Intro to General Chemistry3h 48m
- Classification of Matter18m
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- Crystal Field Theory Summary8m
- Magnetic Properties of Complex Ions9m
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- Magnetic Properties of Complex Ions: Octahedral Complexes11m
2. Atoms & Elements
The Atom
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following is the atomic number of boron?
A
13
B
5
C
11
D
6
Verified step by step guidance1
Recall that the atomic number of an element is the number of protons in the nucleus of an atom of that element.
Identify boron on the periodic table to find its atomic number.
Note that boron is located in period 2 and group 13 of the periodic table.
The atomic number corresponds to the position of the element in the periodic table, which for boron is 5.
Therefore, the atomic number of boron is 5, meaning it has 5 protons in its nucleus.
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