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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
Which of the following elements is a noble gas among the first 20 elements?
Chlorine (Cl).
Phosphorus (P).
Silicon (Si).
Neon (Ne).
Why is Hydrogen sometimes placed separately from Group 1 elements?
It's a noble gas.
It's radioactive.
It has no protons.
It's a non-metal with unique properties.
Who put forward the periodic law?
Lothar Meyer.
Newlands.
Dobereiner.
Mendeleev.
The modern periodic table is made up of?
8 groups.
10 groups.
18 groups.
16 groups.
An element has an atomic number of 15. In which group and period is it located?
Group 3, Period 15.
Group 15, Period 2.
Group 5, Period 3.
Group 15, Period 3.
