Solid im pretty sure thats what the (s) means
Answer:
Explanation:
A compound must have a net charge of 0. The charges have to balance each other out and equal 0.
We have the compound sulfur trioxide with a chemical formula of SO₃.
Oxygen (O) has an oxidation state of -2, which means it will have a charge of -2 in the compound. However, note there is a subscript after the O in the chemical formula. Therefore, there are 3 oxygen atoms in the compound and each one has a charge of -2. The oxygen has an overall charge of -6 because 3*-2 = -6.
There is only one atom of sulfur (there is no subscript, so a 1 is implied). It has to balance out the -6 charge of the oxygen atoms, so it must be +6.
The oxidation number for sulfur is +6 in the compound sulfur trioxide.
Explanation:
Given parameters:
Atomic number = 82
Mass number = 207
Unknown:
Number of protons = ?
Number of neutrons = ?
Number of electrons = ?
Solution:
An atom is made up of some particles:
Protons are the positively charged particles
Electrons are negatively charged
Neutrons carry no charge
The atom is made up of dense and massive nucleus consisting of protons and neutrons.
The outer space is occupied by the electrons
The mass number is the number of protons and neutrons in an atom
Atomic number is number of protons
Number of protons = Atomic number = 82
Since the atom is a neutral atom, the number of protons is the same as the number of electrons and this is 82
The number of neutrons is the difference between mass and atomic number:
neutrons = 207 - 82 = 125
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The correct answer is A. A test tube of zinc oxide. Zinc oxide is a compound which is a pure substance composed of two or more elements. They can only be separated or broken down into its individual elements or smaller compounds by chemical means. Therefore, the answer is a test tube of zinc oxide.