Matter
It is anything that occupy space has mass and volume.
Matter
The sub-atomic particle that has a positive charge.
Proton
What is the name of the theory proposed by J.J. Thompson?
Plum Pudding Atom
The phase of matter where molecules are far apart from each other and can easily move.
Gas
The element in the periodic table with a chemical symbol of He.
Helium
Which state of matter has a definite volume but takes the shape of its container?
Liquid
The sub - atomic particles that carries a negative charge.
Electron
Who formulate the theory that atoms are solid sphere like a billiard ball?
John Dalton
The change of phase of matter from liquid to gas.
Evaporation
If the atomic number of an element is 12, what is the number of protons?
12 (Atomic Number is equal to the number Protons)
How will you classify water (H20), is it an element, compound or a mixture?
Compound (Made of two elements - Hydrogen and Oxygen).
Number of Protons
He discovered the positive charge through his experiment and formulated the nuclear model of the atom.
Ernest Rutherford
It is the theory that states the higher the temperature the higher the kinetic energy.
Kinetic Molecular Theory
If element X has an atomic mass of 40, what is the number of neutrons?
Unknown/Cannot be determined because atomic number is not given.
What is the chemical symbol of the compound Carbon Dioxide?
CO2
Name the two sub-atomic particles that are found at the nucleus of the atom.
Protons and Neutrons
It is the greek word which means "indestructible".
Atomos
When a liquid evaporates into a gas, the individual molecules break apart into separate atoms.
False (Phase changes alter distances between molecules, not the chemical bonds within them)
If element Z is neutral and has an atomic number of 15, and atomic mass of 30, what is the number of electrons?
15 (Atomic number = protons = electrons)
In which state of matter where vibrations could easily transfer from one molecule to another? Support your answer.
Solid
In what specific sub-atomic particles of the atom where the atomic mass is concentrated? Support your answer.
Neutrons
True of False: Compounds are formed when atoms of the same elements combined together.
False: Compounds are made from atoms of different elements.
An ionized state of matter consisting of free electrons and positive ions.
Plasma
How the elements in the modern periodic table is organized or arranged?
Increasing atomic number