We’re being asked to fill the gap in the fourth row of the table which is to determine the number of electrons.
An element can be represented as:
You can determine the identity of the element using its atomic number:
Atomic number (Z):
• represents the identity of the element
• reveals the number of protons
• in a neutral element:
# of protons = # of electrons
Mass number (A)
• reveals the number of protons and neutrons
mass number = # of protons + # of neutrons
Symbol | 79Br | ||||
Protons | 25 | 82 | |||
Neutrons | 30 | 64 | |||
Electrons | 48 | 86 | |||
Mass no. | 222 | 207 |
Complete the fourth row of the table.
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Ions concept. You can view video lessons to learn Ions. Or if you need more Ions practice, you can also practice Ions practice problems.