Elements
Element with symbol Na
Sodium
Is a blend of two or more kinds of matter, each of which keeps its own identity and properties
Mixture
Solid, liquid, gas and plasma
The boiling point of a substance is a physical or chemical property?
Physical property
Is a pure substance that cannot be separated into simpler substances by physical or chemical means.
Element
The symbol of Potassium
K
Homogeneous mixtures are also called
Solutions
Element
Change in a substance that does not involve a change in the identity of the substance
Physical change
Is a law that says: A compound is always composed of the same elements in the same proportion by mass
Law of Definite proportions
Elements that are good conductors of heat and electricity
Metals
Has a fixed composition and can be separated or not
Pure substance
Is the smallest unit of an element that maintains the chemical identity of that element
Is a change in which one or more substances are converted into different substances
Chemical change
Is made up of two or more different elements that are combined chemically in a fixed ratio.
Compound
These elements tend to be semiconductors of electricity
Metalloids
The composition of these mixtures is uniform, examples are air, honey, saltwater
Homogeneous mixtures
Properties that depend on the amount of matter that is present
Extensive properties
A lake freezing is an example of what type of change?
Physical change
Is a law that occurs when the same two elements combine to form more than one compound.
Law of multiple proportions
List the elements of Group 2 from Periodic Table.
Beryllium, Magnesium, Calcium, Strontium, Barium, Radium.
Pure substances that can be decomposed by ordinary chemical means
Compounds
Is found in fluorescent bulbs and stars, has a high temperature and its matter is made up of charged particles
Plasma
Cooking an egg is an example of what type of change?
Chemical change
He created the first version of the periodic table of the elements
Dmitri Mendeleev