Grade 9 Chem Review Flashcards
(30 cards)
Metals have no lustre
False. They are shiny
Most elements can be classified as metal or
Nonmetal
An atom makes up everything
True
The central part of an atom
Nucleus
Protons have a ________ charge
Positive
Neutrons have a __________ charge
Neutral or no
A liquid turning to solid is a _________ change
Physical
A nail rusting is a ________ change
Chemical
The colour of an element is a __________ property
Physical
The formation of a new substance is a __________ change
Chemical
Electrons are _________ charged particles
Negatively
The atomic mass equals the _______ + _______
Protons and neutrons
The atomic number equals the ___________ number
Proton
The valency is the charge on an atom due to the electrons on the outer shell
True
A row is also known as a
Period
A column is also known as a family or
Group
The most reactive groups are groups 1 and 7
True
The least reactive group is group number?
8
Group 7 is known as the _________
Halogens
An element that acts as a metal and nonmetal is known as a _________________
Metalloid
The electron shells are filled from the inner ring by 2, 8, ?
2,8,8
The elements on the left side of the periodic table are mostly
Metals
The elements on the right side of the periodic table are mostly
Non metals
Transition metals are found mainly in the middle section of the periodic table
True
