
Concept explainers
(a)
Interpretation:
From the given data, the corresponding elements and the number of each nucleons has to be found.
Concept introduction:
The smallest constituent of matter is atom. Each atom consist of subatomic particles called electrons, protons and neutrons. Protons and neutrons are present in the nucleus and called nucleons. A group of atoms having same number of protons are called as an element.
The atomic
Where
(a)

Answer to Problem 107AE
The given element is found to be phosphorus
Number of protons
Number of neutrons
Explanation of Solution
Given,
Atomic number,
Mass number,
The atomic number of the element is equal to the number of protons.
The mass number is equal to the sum of the number of protons and neutrons.
The element with atomic number 15 was found to be phosphorus
(b)
Interpretation:
From the given data, the corresponding elements and the number of each nucleons has to be found.
Concept introduction:
The smallest constituent of matter is atom. Each atom consist of subatomic particles called electrons, protons and neutrons. Protons and neutrons are present in the nucleus and called nucleons. A group of atoms having same number of protons are called as an element.
The atomic symbol for an element can be represented as
Where
(b)

Answer to Problem 107AE
The given element is found to be potassium
Number of protons
Number of neutrons
Explanation of Solution
Given,
Atomic number,
Mass number,
The atomic number of the element is equal to the number of protons.
The mass number is equal to the sum of the number of protons and neutrons.
The element with atomic number 19 was found to be potassium
(c)
Interpretation:
From the given data, the corresponding elements and the number of each nucleons has to be found.
Concept introduction:
The smallest constituent of matter is atom. Each atom consist of subatomic particles called electrons, protons and neutrons. Protons and neutrons are present in the nucleus and called nucleons. A group of atoms having same number of protons are called as an element.
The atomic symbol for an element can be represented as
Where
(c)

Answer to Problem 107AE
The given element is found to be iodine
Number of protons
Number of neutrons
Explanation of Solution
Given,
Atomic number,
Mass number,
The atomic number of the element is equal to the number of protons.
The mass number is equal to the sum of the number of protons and neutrons.
The element with atomic number 15 was found to be iodine
(d)
Interpretation:
From the given data, the corresponding elements and the number of each nucleons has to be found.
Concept introduction:
The smallest constituent of matter is atom. Each atom consist of subatomic particles called electrons, protons and neutrons. Protons and neutrons are present in the nucleus and called nucleons. A group of atoms having same number of protons are called as an element.
The atomic symbol for an element can be represented as
Where
(d)

Answer to Problem 107AE
The given element is found to be ytterbium
Number of protons
Number of neutrons
Explanation of Solution
Given,
Atomic number,
Mass number,
The atomic number of the element is equal to the number of protons.
The mass number is equal to the sum of the number of protons and neutrons.
The element with atomic number 70 was found to be ytterbium
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Chapter 2 Solutions
Chemistry
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