Periodic Table

Question 1

What is the major difference between the periodic table created by Dmitri Mendeleev and the one created by Henry Moseley?

Revolt · Accepted Answer

Moseley arranged the elements in order of increasing atomic number.

Question 2

Which statements accurately describe trends found in the periodic table? Check all that apply.Henry Moseley established a periodic table that arranges the elements by atomic number.The atomic mass decreases from left to right on the periodic table.The atomic number increases from left to right on the periodic table.Nonmetals create a “staircase” down the periodic table.Metalloids have the characteristics of both metals and nonmetals.

Revolt · Accepted Answer

Henry Moseley established a periodic table that arranges the elements by atomic number.; The atomic number increases from left to right on the periodic table.; Metalloids have the characteristics of both metals and nonmetals.

Question 3

Use the drop-down menus to complete the statements.

Revolt · Accepted Answer

group; A vertical column of elements in the periodic table is called a .: group; A horizontal row of elements in the periodic table is called a .: period; Atoms of elements in the same group have the same .: number of valence electrons; As you move from left to right on the periodic table, the atomic number .: increases

Question 4

group✔ period

Revolt · Accepted Answer

✔ period

Question 5

atomic number chemical properties ✔ number of valence electrons period number

Revolt · Accepted Answer

✔ number of valence electrons

Question 6

Use the drop-down menus to complete the statements.

Revolt · Accepted Answer

A vertical column of elements in the periodic table is called a .: group; A horizontal row of elements in the periodic table is called a .: period; Atoms of elements in the same group have the same .: number of valence electrons; As you move from left to right on the periodic table, the atomic number .: increases

Question 7

X decreases ✔ increases stays the same

Revolt · Accepted Answer

✔ increases

Question 8

How many protons are in an atom of copper? | How many electrons are in an atom of copper? | How many neutrons are in an atom of copper? Round your answer to the nearest whole number.

Revolt · Accepted Answer

29; 35

Question 9

How many protons are in an atom of copper? | How many electrons are in an atom of copper? | How many neutrons are in an atom of copper? Round your answer to the nearest whole number.

Revolt · Accepted Answer

29

Question 10

How many protons are in an atom of copper? | How many electrons are in an atom of copper? | How many neutrons are in an atom of copper? Round your answer to the nearest whole number.

Revolt · Accepted Answer

35

Periodic Table Answers

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