matter
What is the name of the change when a liquid becomes a solid?
Freezing
What is the atomic number for Chlorine?
16
What is the charge of an electron?
The period of element with atomic number 20 in the periodic table is _________
4
What´s the chemical formula for water?
H2O
In which state of matter are the particles mostly touching but arranged in a random way?
Liquid
What's the number of protons and electrons in the atom Uranium?
92
What revolves around the nucleus?
Electrons
Group 1 elements are called as ________
Alkali metals
The removal of oxygen from a substance is called ________.
Reduction
In which state of matter do the particles have the most energy?
Gas
What property of an element determines its chemical behavior?
Valency of an Element
How many electrons are in the first shell of a carbon atom?
2
In Mendeleev's periodic classification, what is the number of groups?
8
What is the smallest particle of water?
Molecule
Which theory describes the arrangement and movement of particles and solids, liquids, and gases?
Kinetic Theory
A material that is made up of one type of atom is known as an ______
element
What is the magnitude of the charge of electrons?
-1
Group 18 of the periodic table is known by the name as _________
Noble
Which formula represents the simplest notational form?
Emperical formula
What eventually happens to a gas if its pressure is increased?
The outermost shell of an atom is known as ___________
Valence Shell
Who dissolved electrons?
J J Thomson
How many series' of transition elements are present in the periodic table?
4
The formula that shows the number and kind of atoms which a substance of a molecule contained, is known as ___________
Chemical Formula