Concept explainers
(a)
Interpretation:
The element needs to be identified according to the given information.
Concept introduction:
The elements are arranged in the periodic table in increasing order of their
(b)
Interpretation:
The element needs to be identified according to the given information.
Concept introduction:
The elements are arranged in the periodic table in increasing order of their atomic number. There are 18 groups and 7 periods in the periodic table. The number of protons present in a nucleus of the atom is equal to its atomic number.
(c)
Interpretation:
The element needs to be identified according to the given information.
Concept introduction:
The elements are arranged in the periodic table in increasing order of their atomic number. There are 18 groups and 7 periods in the periodic table. The number of protons present in a nucleus of the atom is equal to its atomic number.
(d)
Interpretation:
The element needs to be identified according to the given information.
Concept introduction:
The elements are arranged in the periodic table in increasing order of their atomic number. There are 18 groups and 7 periods in the periodic table. The number of protons present in a nucleus of the atom is equal to its atomic number.
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Chapter 2 Solutions
Chemistry: Principles and Reactions
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- 11. Write the symbol for each of the following ions: (a) the ion with a 1+ charge, atomic number 55, and mass number 133 (b) the ion with 54 electrons, 53 protons, and 74 neutrons (c) the ion with atomic number 15, mass number 31, and a 3- charge (d) the ion with 24 electrons, 30 neutrons, and a 3+ chargearrow_forwardHelium is the lightest noble gas and the second most abundant element (after hydrogen) in the universe. (a) The radius of a helium atom is 3.1x10-11 m; the radius of its nucleus is 2.5x10-15 m. What fraction of the spherical atomic volume is occupied by the nucleus (V of a sphere 5 4/ 3πr3)? (b) The mass of a helium-4 atom is 6.64648x10-24 g, and each of its two electrons has a mass of 9.10939x10-28 g. What fraction of this atom’s mass is contributed by its nucleus?arrow_forwardWrite the symbol for each of the following ions:(a) the ion with a 1+ charge, atomic number 55, and mass number 133(b) the ion with 54 electrons, 53 protons, and 74 neutrons(c) the ion with atomic number 15, mass number 31, and a 3− charge(d) the ion with 24 electrons, 30 neutrons, and a 3+ chargearrow_forward
- Identify each of the following elements as a metal, non-metal, or metalloid: (a) gallium, (b) molybdenum, (c) tellurium, (d) arsenic, (e) xenon, (f) ruthenium.arrow_forward(a) Which two of the following are isotopes of the same element:3116X, 3115X, 3216X? (b) What is the identity of the elementwhose isotopes you have selected?arrow_forwardAtoms of each of the following elements are essential for life. Give the group name for the following elements:(a) chlorine(b) calcium(c) sodium(d) sulfurarrow_forward
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