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Revise smart, understand Better

ENERGY: Action of electricity on materials
ENERGY: Action of heat on materials
MATTER - PROPERTIES AND TRANSFORMATION: Chemical Reactions And Equations
MATTER - PROPERTIES AND TRANSFORMATION: Chemical Symbols, Formulae And Valency
MATTER - PROPERTIES AND TRANSFORMATION: Effect Of Heat On Substances
MATTER - PROPERTIES AND TRANSFORMATION: Introduction To Chemistry - Symbols
MATTER - PROPERTIES AND TRANSFORMATION: Mixtures And Pure Substances
MATTER - PROPERTIES AND TRANSFORMATION: Periodic table - Families of elements and Relative reactivity
MATTER - PROPERTIES AND TRANSFORMATION: Reaction With Oxygen of air
MATTER - PROPERTIES AND TRANSFORMATION: The Atom And Sub-Atomic Particles

5/70 MCQs for:

MATTER - PROPERTIES AND TRANSFORMATION: Periodic table - Families of elements and Relative reactivity

The elements of group II arranged in order of increasing relative atomic number are:

Be, Ca, Mg.

Mg, Ca, Be.

Be, Mg, Ca.

Ca, Be, Mg.

What was the primary reason for the early attempts to classify elements?

To organize and understand their properties and relationships.

To identify their subatomic particles.

To invent new elements.

To determine their exact atomic mass.

The horizontal rows of elements in the periodic table are called?

Periods.

Periodicity.

Groupings.

Groups.

The 'need to classify elements' primarily arose from:

The invention of new scientific instruments.

The desire to predict new elements.

The understanding of subatomic particles.

The growing number of discovered elements with varied properties.

Who put forward the periodic law?

Mendeleev.

Newlands.

Lothar Meyer.

Dobereiner.