Answer:
False
Explanation:
Phosphorus is number 15 on the periodic table, so its electronic configuration is:
<u>Answer:</u>
The correct answer option is a. Selenium (Se).
<u>Explanation:</u>
From the given answer options, Selenium (Se) is the only element which is a non metal.
It has the atomic number 34 with atomic weight 78.96. It is a member of the sulfur group of the non metallic elements and falls in period 4 of the Periodic table.
Selenium has non metallic properties which are intermediate between the elements that lie above and below it in the Periodic table.
Answer: keep a current from passing out of the wire
Explanation: plastic is an insulator and will not conduct electricity
Answer:
25
Explanation:
mass number = protons + neutrons
= 13 + 12 = 25
The number of shells increase, the energy level their outer shell have decreases as we go down wards,
