An extract of the Periodic Table shows trends across periods and down groups.
In the Periodic Table, which number increases from 19 to 36 in Period 4?
In the Periodic Table, which value increases from approximately 9 to 226 in Group 2?
An atom of oxygen 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 no electrical charge are ___________
The particles with the smallest relative mass are ___________
The two types of subatomic particles found inside the nucleus of an oxygen atom are ___________ and ___________
In a neutral oxygen atom, there is an equal number of ___________ and ___________
Oxygen has different isotopes. These isotopes differ in their number of ___________
