LI 4: We are learning to describe Atoms
Read this website and answer the following questions about atoms: What is an atom? An atom is made up of protons and neutrons that electron spins in orbits around the outside of the nucleus What is a proton? A proton is an positively charged particle that is located in the centre of the atom in nucleus What is a neutron? A neutron is a neutral. It doesn’t have a charge What is an electron? An electron is an negatively charged partical that spins around the outside of the nucleus Each element has a different number of protons. This is how we tell them apart. They also have different number of neutrons and electrons, but these can change. Helium has 2 protons so its atomic number is 2, it also has 1 or 2 neutrons and 2 electrons. This is different to Lithium which has 3 protons and an atomic number of 3. It also has 3 electrons and 3 or 4 neutrons. Each element has its own symbol.
|