LI 4: We are learning to describe Atoms
Read this website and answer the following questions about atoms: What is an atom? What is a proton? proton is a positively charged particle that is located at the center of the atom in the nucleus. What is a neutron? The neutron doesn’t have any charge. The number of neutrons affects the mass and the radioactivity of the atom. What is an electron? The electron is a negatively charged particle 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.
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