An extract of the Periodic Table shows trends across periods and down groups.
In the Periodic Table, which number increases from 11 to 18 in Period 3?
In the Periodic Table, which value increases from approximately 7 to 223 in Group 1?
An atom of carbon contains protons, neutrons, and electrons.
Use words from the box below to complete the sentences. You may use each word once, more than once, or not at all.
protonsneutronselectrons \text{protons} \quad \text{neutrons} \quad \text{electrons} protonsneutronselectronsThe particles with the smallest mass are ____________.
The particles with a positive charge are ____________.
The two types of particle in the nucleus of a carbon atom are ____________ and ____________.
In a carbon atom there are equal numbers of ____________ and ____________.
Carbon has isotopes. These isotopes have different numbers of ____________.
