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level: Atoms Elements and Compounds

Questions and Answers List

level questions: Atoms Elements and Compounds

Question	Answer
Atoms consist of a ___ that has protons and neutrons surrounded by electrons outside the ___	Nucleus
All substances are made up from?	Atoms
An atom contains three tiny particles called...	Protons Neutrons Electrons
The nucleus is found in the ___ of an atom.	Centre
Protons and neutrons are heavier or lighter than electrons?	Heavier
Protons are...	Positively charged
Electrons are...	Negatively charged
Neutrons are...	Neutral
What particles can you find moving around the outside of the nucleus?	Electrons
Atoms are...	Neutral
Why do atoms have no charge?	They have equal protons and electrons
An atom with an uneven number of protons and electrons is called an?	Ion
What does the mass number tell you on the symbol of an atom?	The total number of protons and neutrons
A substance containing only atoms with the same number of protons is called an?	Element
An element is a substance made of atoms which all contain the same number of ___ in their nucleus	Protons
The types of atoms are decided by the amount of ___ in the nucleus	Protons
How many elements consist of only one type of atom?	All of them
Elements are represented by?	Symbols
Isotopes have the same number of protons but extra?	Neutrons
Isotopes have the same?	Atomic number
Isotopes have different ?	Mass numbers
Compounds are substances formed from two or more?	Elements
Elements react combining atoms with other atoms, therefore forming?	Compounds
The atoms of each element, formed into a compound, are held together by what?	Chemical bonds
Which particle of an atom is involved in making bonds?	Electrons
All compounds consist of ?	Molecules
A chemical bond that generates two oppositely charged ions forms which type of bond?	Ionic bonding
Which type of bond is created by two non type metals by sharing electrons?	Covalent bonding
A compound formed from a metal and non-metal consist of which type of ions?	Positive and Negative