The document provides an overview of the first 10 elements of the periodic table and basic atomic structure. It explains that the periodic table is based on Dmitri Mendeleev's 1869 version, with elements in the same row sharing properties. Atoms have protons and neutrons in the nucleus and electrons in shells surrounding the nucleus, with the first period having one electron shell and the second period having two electron shells.

1. First 10 elements of the periodic table
General informationThe periodic table we use today is based on the one devised and
published by Dmitri Mendeleev in 1869
All the rows go left to right, and elements have something in common if
they are in the same row
Electrons are the negatively charged particles of an atom, protons are
the positively charged particles of an atom
Together, all of the electrons of an atom create a negativecharge that
balances the positive charge of the protons in the atomic nucleus
Atoms are the general term used to describe pieces of matter and
they have three basic parts; protons, neutrons and electrons
Atomic shells- the centre is called the nucleus, electrons are found in
areas called shells that surround the centre of the atom (energy level)
and each of those shells have a name
Every element in the top row (the first period) has one orbital for its
electrons and all the elements in the second row (second period) have
two orbitals for their electrons