Hi there I believe it’s 18 please let me know if I’m wrong :)
Lithium, sodium, potassium, rubidium, cesium, and francium
Answer:
4. they have the same number of protons
Explanation:
while all the other particles and attributes can be changed, protons cannot.
<span>Chlorofluorocarbons (CFCs) can damage the ozone layer.</span>
