IGCSE Chemistry: Specimen Questions with Answers 118 - 119 of 240

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Question 118

Write in Short

Short Answer▾

Complete the following sentences about isotopes using words from the list below

Sentences About Isotopes Using Words

Isotopes are atoms of the same element with the same number of …

And different numbers of … Some isotopes such as uranium-235 are

… Uranium can be used as a source of … [4 Marks]

Explanation

Isotopes are the atoms of same element with the same no. of proton and different no. of neutrons. Some isotopes such as are radioactive. can be used as a source of energy. Because The Uranium Atom. … The isotope is important because under certain conditions it can readily be split, yielding a lot of energy. It is therefore said to be ‘fissile’ and we use the expression ‘nuclear fission’ . Meanwhile, like all radioactive isotopes, they decay. As shown in figure given below.

The Isotopes of Hydrogen

The use of Uranium as nuclear fuel

The Use of Uranium as Nuclear Fuel

Question 119

Question

MCQ▾

are all examples of ________.

Choices

Choice (4)

a.

Base

b.

Salt

c.

Acid

d.

Question does not provide sufficient data or is vague

Answer

a.

Explanation

produce ions when dissolved in water. ions indicate the presence of base. Thus, are all examples of bases.

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