Question

Potassium (K) and copper (Cu) are both in period 4. They both have _____.

A) Similiar properties
B)The same number of protons
C)Four electron shells
D)The same number of electrons

Answer 1

Answer:The answer is C.

Explanation:hope this helps you!

Answer 2

They both have Four electron shells

Step-by-step explanation:

• The periodic table arranges elements into columns called groups and rows called periods.
• Elements in the same group share similar chemical and physical properties.
• For example, elements in group 1 called alkali metals have similar properties. They include sodium, lithium, and potassium among others.
• On the other hand elements in the same period have the same number of energy levels or electron shells. For example, elements in period 4 have four energy levels.