It's A because in that model it's gas the sun in the middle and it shows the different layered circles and how they move whitch helps balance our solar system
Answer: corals, crabs, oysters and urchins
Explanation:
Answer: Option C) The Atomic number is 13
Explanation:
The number of neutrons + Protrons = Atomic Mass
Thus, 15 + Protrons = 28
Protrons = 28 - 15 = 13
Usually, the number of protons in an atom is always EQUAL to the Atomic number of the atom
Since number of protons is 13, therefore the atomic number of the given atom is 13
I hope this helps the answer is A
Erthyrocytes you can look this stuff up
