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Chapter 2: Discussion Questions (page 46)

Q.12. Which (if any) of the following can be determined by knowing the number of protons in a neutral element? Explain your answer.
a. the number of neutrons in the neutral element
b. the number of electrons in the neutral element
C. the name of the element

Short Answer

Expert verified

Answer

B and C can be determined by knowing the number of protons in a neutral element.

Step by step solution

01

Step-by-Step SolutionStep 1:  Atoms becomes neutral

The atoms become neutral when an atom has an equal number of protons and electrons.

Number of protons = Number of electrons

02

Quantity that can be determined by knowing the number of protons in the neutral atom

The number of neutrons and protons are same for all the neutral atoms of the same element. Hence, if the number of protons are given, the number of electrons in the neutral atom can be determined.

The mane of the element is determined by its position in the periodic table. The elements are arranged in the order of the increasing atomic number in the periodic table.

The number of neutrons cannot be determine by knowing the number of protons, as atomic mass is needed for finding the number of neutrons.

Hence, B and C can be determined by knowing the number of protons in a neutral element.

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Most popular questions from this chapter

Elements in the same family often form oxyanions of the same general formula. The anions are named in a similar fashion. What are the names of the oxyanions of selenium and tellurium: SeO42-,SeO32-,TeO42-,TeO32-.

Q.4. In this chapter, you have learned a systematic way to name chemical compounds. What if all compounds had only common names? What problems would this cause?

Q.19. A reaction of 1 L of chlorine gas (Cl2) with 5 L of fluorine gas (F2) yields 2 L of a gaseous product. All gas volumes are at the same temperature and pressure. What is the formula of the gaseous product?

The isotope of an unknown element, X, has a mass number of 79. The most stable ion of the isotope has 36 electrons and forms a binary compound with sodium having a formula of Na2X. Which of the following statements is(are) true? Correct the false statements.
a. The binary compound formed between X and fluorine will be a covalent compound.
b. The isotope of X contains 38 protons.
C. The isotope of X contains 41 neutrons.
d. The identity of X is strontium, Sr.

Question: What are the names of the compounds that correspond to the formulas given in the following table?

Formula

Compound Name

Co(NO2)2

Cobalt (II) nitrate

AsF5

Arsenic pentafluoride

LiCN

Lithium cyanide

K2SO3

Potassium sulfite

Li3N

Lithium nitride

PbCrO4

Lead (II) chromate
See all solutions

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