Regents Chemistry Test Preparation Practice Elements In The Periodic Table

The elements on the Periodic Table are arranged in order of increasing*

(1) atomic mass

(2) atomic number

(3) molar mass

(4) oxidation number

The elements on the Periodic Table are arranged in order of increasing*

(1) mass number

(2) atomic number

(3) number of isotopes

(4) number of valence electrons

In which group on the Periodic Table would a nonmetallic element belong if atoms of this element tend to gain two electrons to complete their valence shell?*

(1) 14

(2) 15

(3) 16

(4) 17

The elements on the Periodic Table of the Elements are arranged in order of increasing*

(1) atomic number

(2) mass number

(3) number of neutrons

(4) number of valence electrons

Element X reacts with chlorine to form an ionic compound that has the formula XCl₂. To which group on the Periodic Table could element X belong?*

(1) Group 1

(2) Group 2

(3) Group 13

(4) Group 15

Which element has atoms that can form halide ions?*

(1) iodine

(2) silver

(3) strontium

(4) xenon

What is the atomic number of the element whose atoms bond to each other in chains, rings, and networks?*

(1) 10

(2) 8

(3) 6

(4) 4

In the formula for the compound XCl₄, the X could represent*

(1) C

(2) H

(3) Mg

(4) Zn

The elements in Period 4 on the Periodic Table are arranged in order of increasing*

(1) atomic radius

(2) atomic number

(3) number of valence electrons

(4) number of occupied shells of electrons

Identify the element in Period 3 that is an unreactive gas at STP.*

Base your answers to questions 11 on the information below and on your knowledge of chemistry.

Before atomic numbers were known, Mendeleev developed a classification system for the 63 elements known in 1872, using oxide formulas and atomic masses. He used an R in the oxide formulas to represent any element in each group. The atomic mass was listed in parentheses after the symbol of each element. A modified version of Mendeleev’s classification system is shown in the table below.

Identify one characteristic used by Mendeleev to develop his classification system of the elements.*

Base your answers to questions 12 on the information below and on your knowledge of chemistry.

Three elements, represented by D, E, and Q, are located in Period 3. Some properties of these elements are listed in the table below. A student’s experimental result indicates that the density of element Q is 2.10 g/cm³, at room temperature and standard pressure.

Identify the group on the Periodic Table to which element D belongs.*

Base your answers to questions 13 on the information below and on your knowledge of chemistry.

Identify the element in stearic acid that makes it an organic compound.*

Base your answers to questions 14 on the information below and on your knowledge of chemistry.

In the late 1800s, Dmitri Mendeleev developed a periodic table of the elements known at that time. Based on the pattern in his periodic table, he was able to predict properties of some elements that had not yet been discovered. Information about two of these elements is shown in the table below.

Write a chemical formula for the compound formed between Ea and Cl.*

Base your answers to questions 15 on the information below and on your knowledge of chemistry.

Ethyl ethanoate is used as a solvent for varnishes and in the manufacture of artificial leather. The formula below represents a molecule of ethyl ethanoate.

Identify the element in ethyl ethanoate that makes it an organic compound.*