inside atoms chemistry lower secondary.pptx

chemistry year 8

1. INSIDE ATOMS

2. Sub-atomic particles Atom is the smallest particles of the elements Atoms are made of tiny sub-atomci particles: protons, neutrons, and electrons Protons and neutrons make up the nucleus.

3. Sub-atomic particles nucleus is at the centre of the an atom electrons are orbit outside the nuecleus

4. Mass and charge 2000

5. Why do atoms have no electric charge? They have charged sub-atomic particles But they have no net charge The number of protons is equal to the number of the electrons

6. What holds an atom together? Atom is held together by electrostatic attraction between postively charged nucleus and negatively charged electrons