(1) chemical energy → electrical energy
(2) electrical energy → chemical energy
(3) light energy → heat energy
(4) light energy → chemical energy
Answer:
(2) electrical energy -> chemical energy
Explanation:
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c. can be broken down into atoms.
b. smells.
d. reacts with other substances.
Answer: 8.25 moles of oxygen are produced.
Explanation: The reaction follows:
By Stoichiometry,
As, 4 moles of Aluminium is produced by 2 moles of aluminium oxide
11 moles of aluminium will be produced by =
Now, 2 moles of aluminium oxide produces 3 moles of oxygen, so
5.5 moles of Aluminium oxide will produce =
Hence, 8.25 moles of oxygen will be produced.
white
black
blue
alkaline earth metal.
halogen.
inner transition metal.
Atoms of different element can not have same atomic number because only same type of atoms combine to form element. Atoms belonging to different element can have different atomic number. Therefore, chlorine belongs to halogen family.
Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same. Two or more than two atoms with different physical or chemical properties can not combine together to form an element.
Chlorine is a Halogen. These are all elements in Group 17 (right next to the Nobel Gases). Atomic number of chlorine is 17. Chlorine needs only one electron to completes its octet. Chlorine exist as gas.
Therefore, chlorine belongs to halogen family.
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