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Atomic structure Basic
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Where are electrons found?
they orbit around the nucleus
Which part of the atom is the most dense?
Nucleus
What are the building blocks of matter?
Atoms
How do you calculate Mass number?
add protons and nutrons
A balanced (neutral charged) atom has equal numbers of ____ and _____
protons and electrons
What gives an atom its mass?
its nucleus
How do scientists identify an element?
by its proton number
What are the 3 subatomic particles in an atom?
protons, electrons and neutrons
Protons-location and charge
positively charged particle located in the nucleus of an atom
What does the periodic table contain?
a chart where all the elements are organised into periods and groups according to their properties
Where is the nucleus located in the atom?
The center core of an atom that contains the protons and neutrons
neutron-location and charge
the particle with no charge; located in the nucleus
What is an electron?
negatively charged particle that orbits the nucleus of an atom.It has negligible mass.
What is atomic number?
the number of protons in the nucleus which gives the identity of the element
Define atom-3 points
Basic unit of matter smallest particle of an element can be divided into protons, neutrons and electrons.