What is the percent by mass of sodium in Na2SO4? total mass of element in compound molar mass of compound Use %Element x 100
Given:
Atomic number of an atom = 14
Partial electron configuration = 1s²2s²2p⁶3s²X
To determine:
The identity of X
Explanation:
Based on the Aufbau rule, the order in which the orbitals fill up based on energetic considerations is:
1s 2s 2p 3s 3p 4s 3d 4p ....
maximum # electrons in s orbital = 2, p = 6, d = 10 and so on
Since 3p would follow the 3s orbital, in this case we will have the full configuration as:
1s²2s²2p⁶3s²3p²
Ans c) X = 3p²
<h3><u>Answer;</u></h3>
Physical property
<h3><u>Explanation;</u></h3>
- A physical property is an aspect of matter that can be observed or measured without changing it. Examples of physical properties include color, shape, size, molecular weight and volume.
- A chemical property on the other hand may only be observed by changing the chemical identity of a substance, that includes whether it can undergo a certain chemical change
.
Answer:
-3
Explanation:
Phosphorus becomes phosphide with a -3 charge
They usually form covalent bonds! When two non-metals bond they are covalent an example is a diamond formed by double carbon atoms!