It must absorb energy in the form of for example heat which gives it the energy required to become excited
hope that helps
Answer:
A
Explanation:
Protons are positive
Neutrons are neutral
Electrons are negative
Protons and Neutrons are in the nucleus
Electrons are orbiting around the nucleus
-3(x - 3) = x + 9 - 4x
Firstly, before we simplify the whole thing altogether, let's simplify each respective side. Distribute accordingly on the left side (the number outside the parentheses is distributed to the numbers inside the parentheses), and we can add the numbers with variables together on the right side.
-3x + 9 = -3x + 9
Now, let's add 3x to both sides, to simplify both sides now. This leaves us with: 1, I believe, since -3 ÷ -3 is 1.
x = x, and since x also equals to 1, our answer is 1. And once you check, substituting 1 for x, you will find that 1 is the correct answer.
Answer:
CN⁻
Explanation:
Oxyanion:
Oxyanion is the anion that have oxygen atom.
General formula:
The general formula for oxyanion is AₓOₓ⁻².
A = symbol of element combining with oxygen.
O = oxygen atom
z,x, = integers
a) = NO⁻
Its is an oxyanion because oxygen atom is present with nitrogen.
b) = SO₄⁻
It is an oxyanion because oxygen atom is present.
c) = CN⁻
This is not an oxyanion because there is no oxygen atom present.
d= CO₃²⁻
It is also an oxyanion because of presence of oxygen atom.
