Each shell can contain only a fixed number of electrons: The first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on.
Nitrogen and hydrogen atoms that make up ammonia (NH3) are held together by polar covalent bonds, where electrons are shared unequally. Nitrogen is significantly more electronegative than hydrogen, so shared electrons spend more of their time orbiting the nitrogen atom.
Answer:
ionic compounds are solids, possess high melting points, conduct electricity, are hard but brittle and are formed from an ionic bond between one metal and one nonmetal.
Explanation:
Answer:
Production of liquid oxygen from air Oxygen is generated by liquefaction of atmospheric air in the air separation unit (ASU). Cryogenic technique is the most commonly used for producing liquid oxygen for industrial and medical applications .
Explanation:
Answer:
<em>23.9 grams carbon</em>
Explanation:
One mole of carbon is 6.023 x 10^23 atoms of C.
If we calculate moles, we can use the molar mass of carbon (12 g/mole) to determine mass of 12x10^23 atoms of C.
(12x10^23 atoms of C)/(6.023 x 10^23 atoms of C/mole C)
moles C = 1.992 moles C
(1.992 moles C)*(12 g/mole C) = 23.9 grams carbon