Barium, Beryllium, Radium, and Calcium.
<h3>Explanation</h3>
All four metal elements (Ba, Be, Ra, and Ca) are found in group 2 of a modern periodic table. By periodicity, they have similar chemical properties.
Shared properties likely include:
- Softness. With only two valence electrons per atom, the four elements form weak metallic bonds. Their pure forms are thus easy to shape and cut.
- High reactivity. Group 2 "alkaline-earth" metals are only two electrons away from ideal gas electron configurations. They lose electrons more readily than most transition metals such as iron and copper do. Group 2 metals tarnish easily in the earth atmosphere, and reacts readily with water to produce hydrogen and a base- hence the name "alkaline."
Answer: The concentration of 
is 0.08 M.
Explanation:-
According to the neutralization law,
where,
= molarity of 
solution = 0.105 M
= volume of solution = 25 ml
= molarity of solution = ?
= volume of solution = 31.5 ml
= valency of = 1
= valency of = 1
Therefore, the concentration of is 0.08 M.
Answer:
Boiling of a substance
Explanation:
When something is boiled, heat is released to the surrounding, making it an exothermic reaction (a type of chemical reaction)
Answer:
Nonmetal oxides react with water to form oxyacids. Ex. CO2 + H2O → H2CO3 Page 3 Decomposition - compound (reactant) breaks down into 2 or more simpler substances.
