#1
Which subatomic particle carries a negative charge?
Electron
ExplanationNegatively charged subatomic particle.
#2
What is the chemical formula for water?
H2O
ExplanationChemical formula for water.
#3
Which of the following is a noble gas?
#4
What is Avogadro's number?
6.022 x 10^23
ExplanationNumber of atoms/molecules in one mole of substance.
#5
What is the charge of a neutron?
Neutral
ExplanationNeutron has no charge.
#6
What is the term for a substance that speeds up a chemical reaction without being consumed in the process?
Catalyst
ExplanationSubstance speeding up chemical reaction.
#7
Who proposed the modern atomic theory?
John Dalton
ExplanationProposed modern atomic theory.
#8
What is the atomic number of carbon?
6
ExplanationAtomic number of carbon.
#9
What is the mass number of an atom?
Number of protons plus neutrons
ExplanationSum of protons and neutrons in an atom.
#10
Which element has the highest electronegativity?
Fluorine
ExplanationElement with highest electronegativity.
#11
What is the Pauli Exclusion Principle?
No two electrons in an atom can have the same set of quantum numbers
ExplanationPrinciple preventing electrons sharing same quantum numbers.
#12
Who first proposed the idea of the periodic table?
Dmitri Mendeleev
ExplanationFirst proposed periodic table.
#13
Which scientist discovered the neutron?
James Chadwick
ExplanationDiscovered the neutron.
#14
Who proposed the concept of the electron cloud?
Erwin Schrödinger
ExplanationProposed electron cloud concept.