Test Revision Flashcards
What is an element?
An element is a substance that cannot be broken down into any other substance. Every element is made up of its own type of atom. This is why the chemical elements are all very different from each other.
What is a mixture?
A mixture is formed when two or more elements or compounds are present without being chemically bonded together.
What is a compound?
A compound is a pure substance that is made from more than one element. In a compound, elements are chemically bonded together, which makes it very difficult to separate them.
What are metals?
Metals are elements that are typically shiny, malleable, ductile, and good conductors of heat and electricity.
What are non-metals?
Non-metals are elements that lack the characteristics of metals and are usually poor conductors of heat and electricity.
Which of the following is a characteristic of non-metals? A) Malleable B) Brittle C) Ductile
B) Brittle
Name one property that distinguishes metals from non-metals.
Metals are good conductors of heat and electricity, while non-metals are poor conductors.
What are alkali metals?
Alkali metals are highly reactive metals found in Group 1 of the periodic table.
What is the term for the ability of a metal to be drawn into wires?
Ductility
True or False: Metals typically have high melting and boiling points.
True
What is the role of metals in electrical wiring?
They conduct electricity efficiently.
What is reactivity in metals?
Reactivity in metals refers to how readily a metal reacts with other substances, such as acids, oxygen, or water.
True or False: Alkali metals are more reactive than transition metals.
True
Fill in the blank: The most reactive metals are found in group ____ of the periodic table.
1
What is the general trend of reactivity in metals as you move down group 1 of the periodic table?
Reactivity increases as you move down the group.
Fill in the blank: Metals that react with acids to produce hydrogen gas are called ____ metals.
reactive
True or False: The periodic table is arranged by increasing atomic mass.
False
Fill in the blank: The element with the symbol ‘Na’ is known as ______.
Sodium
Which group in the periodic table contains the noble gases?
Group 18
What is the name given to the horizontal rows in the periodic table?
Periods
True or False: All elements in the same group have similar chemical properties.
True
Fill in the blank: The element with atomic number 1 is ______.
Hydrogen
