Answer:
Alkali metals are elements found in group 1 of the Periodic Table. Alkali metals are soft, malleable, ductile, and are good conductors of heat and electricity. They have low melting and boiling points compared to most other metals.
Answer:
The answer is A.
Explanation:
Gas particles do not have a fixed position or volume so they move in <em>r</em><em>a</em><em>n</em><em>d</em><em>o</em><em>m</em><em> </em><em>s</em><em>p</em><em>e</em><em>e</em><em>d</em><em> </em><em>a</em><em>n</em><em>d</em><em> </em><em>d</em><em>i</em><em>r</em><em>e</em><em>c</em><em>t</em><em>i</em><em>o</em><em>n</em><em>s</em>.
(Correct me if I am wrong)
Answer:
Enamel is there to protect teeth from decay and damage. Every time you eat and drink, you expose your teeth to acids and bacteria from your food. This would seriously harm teeth if it weren't for enamel.
Explanation:
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<u>Answer</u>:
The phenomenon of marble cancer is due to ACID RAIN.
<u>Explanation</u>:
The marble corrosion is a process by which the marbles or limestone used in construction of monuments and buildings is corroded away by the acid rain. The sulphur-dioxide and nitrogen oxides present in the atmosphere undergoes certain chemical reaction causing this acid rain. These chemical in the acid rain converts the calcium present in the limestone or marble into salt.
Also, this marble cancer leads to change the appearance and color. Sometime due to over corrosion the monuments or building causes them disintegrate .Tajmahal is one of the monument affected by marble cancer. the white color of tai mahal is slowly turning into yellow due to this marble cancer.
Answer:
There are many properties that differentiate metals from non-metals. They are: Luster, conductivity of heat and electricity, physical strength i.e. Brittle or difficult to break, etc.
