<span>Phosphorus is about 0.099% in the Earth's crust. Among the elements in Group 15 in the periodic table, it is the most abundant. Also, it is the most dispersed element in nature. However, it does not occur as a free element. It occurs as a compound.</span>
Answer:
protons
Explanation:
i remember it as positive protons
neutral neutrons and
negetive electrons
answer: it is true because a hypothesis is something you think will happen during a experiment
explained: I took the test
Answer: (3)
Medeleev arranged elements in order of increasing atomic weight and similar properties
He noticed that similar elements were grouped together by using this.
