Answer:
B. Element
Explanation:
Tungsten is an chemical element
<span>your answer is Ca3</span>(PO4)2<span>, </span>
Answer:
Column 17 halogens
Explanation:
To answer the question we need to know the following;
What are valence electrons?
- Valence electrons are outermost electrons in the outermost energy level of an atom of any element.
What are halogens?
- Halogens are group 7 elements that have seven valence electrons. They include, chlorine, fluorine, iodine, etc
What is the reactivity of halogens?
- Halogens are the most reactive non-metals in the periodic table. They react by gaining one electron to attain a stable configuration.
B. 1 mole of beryllium, 2 moles of oxygen, 2 moles of hydrogen
Answer:
C
Explanation:ABC is being broken down into A, B, C
