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Periodic Table Elements Classification

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Questions and Answers

What is the main purpose of the Periodic Table?

To categorize elements based on their physical properties

To group elements with similar chemical properties together (correct)

To list elements in alphabetical order

To identify the atomic number of elements

What type of elements are characterized as being shiny, malleable, and good conductors of heat and electricity?

Molecular compounds

Non-metals

Metals (correct)

Metalloids

What is the defining characteristic of a cation?

Loses an electron (correct)

Gains an electron

Has a magnetic property

Has a neutral charge

What is the general trend for elements in groups 1-3 when forming ions?

They lose electrons to form cations Signup and view all the answers

What is the name of the ion formed when a chlorine atom gains an electron?

Chloride ion Signup and view all the answers

What is the purpose of the periodic law?

To predict the chemical properties of elements based on their atomic number Signup and view all the answers

What is the charge of an electron?

$-1.602 imes 10^{-19}$ Signup and view all the answers

What is the atomic number of a Fluorine atom?

9 Signup and view all the answers

What is the atomic mass of a Beryllium atom?

9.012 amu Signup and view all the answers

What is the number of neutrons in a Nitride ion?

7 Signup and view all the answers

What is the symbol for a Chloride ion?

Cl Signup and view all the answers

What are atoms of the same element but differ in mass called?

Isotopes Signup and view all the answers

What do the different isotopes of magnesium have in common?

Same number of protons Signup and view all the answers

What is the atomic number of deuterium?

1 Signup and view all the answers

What is the formula to calculate the average mass of an element?

Σ(fractional abundance x isotopic mass) Signup and view all the answers

What is the natural abundance of helium-3?

trace Signup and view all the answers

What is the symbol of the element with atomic number 2?

He Signup and view all the answers

What is the atomic mass of boron-11?

11.0093 amu Signup and view all the answers