5.1 Atomic Structure and the Periodic Table Flashcards
What is the periodic table?
how the elements are arranged, in order of their atomic number
What are electrons?
very small negatively charged particles in an atom
What are protons?
positively charged particles in the nucleus of an atom
What are neutrons?
particles with no charge in the nucleus of an atom
What is a nucleus?
the central part of an atom - contains protons and neutrons
what are shells?
the paths or orbits that electrons move along in an atom
Define group
a column in the Periodic Table
Define period
a row in the Periodic Table
Why was the neutron the last particle to be discovered?
As neutrons have no charge, it was discovered the lastest
What is electron arrangement?
Electrons are arranged in shells around the nucleus - the first shell can hold up to 2 electrons; the 2nd and 3rd shells can hold up to 8.
How many groups are there in the Periodic Table
8 groups
Draw a diagram to show the electron shells in a silicon atom. Explain how the structure relates to silicon’s position in the Periodic Table.
It has 4 electrons in its outermost shell, therefore it is in group 4
