Chemistry- Atom,Molecule, Element &compound,

Like charges _____ and opposite charges ______

Like charges = (+) (+) --> repel; (-) (-) --->repel Unlike Charges = (-) (+) --> attract

Types of compounds

molecular compounds and ionic compounds

What is a element ?

A substance made up of only one type of atom, Any symbol on periodic table. Basic chemical substances like O(oxygen), N(nitrogen) , H(Hydrogen)

Difference between compound and mixture

Compound : Are chemically bonded Compound cannot separate physically Ratio of each components is fixed. Boiling point, melting point is constant for one compound. Energy is released when compound is formed. Mixture : Not chemically bound. Components can be physically separated. Ratio of each components varies No energy is released.

what is Ionic Bond?

Ionic bond formed due to mutual attraction between atoms with positive charge and negative charge. + ve charge is call Cation -Ve charge is call Anion.

chemical bonds

There are two types of chemical bonds 1. Covalent bond(Molecular bond) 2. Ionic bond.

What is difference between Element and Compound?

1.Element is a pure substance containing only one kind of Atom. 2.Elements cannot be broken down in to simpler substances by chemical reactions. 3.Elements are like Hydrogen(H), Oxygen(O) 1.compound is a pure substance containing two or more kinds of atoms/elements in fixed proportions. 2.Compound can be separated into simpler substance by chemical reactions. 3.Compound like Water (H2O), sodium chloride (NACL)

What is a molecule?

2 or more atoms bonded together. If two atoms are of same element bonded together it is called Diatomic element. Different elements bond together like compound - H2O.

What is a covalent bond?

A chemical bond formed when two or atoms share electrons. Electrons are shared among atoms ,these sharing of electrons form a glue and it called Covalent bond.

what is molecular compound?

A compound made up of molecules whose atoms are bind to each other through covalent bond.

What is different between Atom Vs Molecule?

Atom : Atom is smallest unit of an element. Atom consist of subatomic particles : Protons, Electrons and neutrons. Atom cannot be separated into subatomic particles by chemical reaction. Molecule : Made of two or more atoms Molecule made of two same atom (Diatomic) or different atoms. Molecule can be separated into atoms by chemical reactions.

The Atom : Overall = Neutral.

Overall = Neutral. Sub atomic parts : Protons = + charge Neutrons = No charge Protons + Neutron = Nucleus of an atom Electrons = - Ve charge

what is an Atom?

the smallest unit of an element that maintains the chemical identity of that element. OR The smallest unit of an element.