1. What can link two atoms together?
2. Which group of elements is stable and doesnt form compounds easily?
noble gases/group 0 in the periodic table
3. How is an elements electron arrangement linked to its position in the periodic table?
Elements in the same group have the same number of electrons in their outer shell.
4. How do positive and negative charges affect each other?
They attract each other.
5. Which sub-atomic particles of atoms take part in chemical reactions?
6. What is an ion?
an atom that is charged because it has lost or gained one or more electrons
7. What happens when an ionic bond is formed?
One atom loses electrons to another atom to form oppositely charged ions that attract each other.
8. Which kinds of elements are usually involved in the formation of ionic bonds?
metals and non-metals
9. How is a positive ion formed and what is it called?
formed by the loss of electrons; cation
10. How is a negative ion formed and what is it called?
formed by the gain of electrons; anion
11. What are the forces called that hold ions together?
electrostatic forces / electrostatic attractions / ionic bond
12. Why do atoms form ions?
to become more stable (like a noble gas)
13. Explain why group 1 elements such as sodium and lithium form a 1+ ion.
They both have one electron in their outer shell and lose it to become stable.
14. What are the charges on calcium, oxide and chloride ions?
2+, 2- and 1-
15. What structure of regularly repeating ions do ionic compounds form?
lattice structure / ionic lattice
16. What is the formula of the nitrate ion?
17. What is the general name for a positive ion?
19. What is the general name for a negative ion?
19. What is the charge on the ions of elements in group 1 of the periodic table?
20. What is the charge on the ions of elements in group 6 of the periodic table?
21. What happens to the electrons in the outer shell of metal atoms when they form ions?
they are lost
22. What is the name of the ionic compound containing calcium and bromine only?
23. What is the name of the ionic compound containing potassium, chlorine and oxygen?
potassium chlorate (any element combined with oxygen is an ___ate )
24. What does a bond do in an element or compound?
holds atoms together
25. What are electrostatic forces of attraction?
attractions between positive and negative charges (positive and negative ions)
26. Which part of an atoms structure is most involved when two atoms react?
the electrons (because they are on the outside of atoms)
27. How many electrons are in the outer shell of the elements in groups 5, 6 and 7?
5, 6 and 7
28. What kind of electron arrangement is most stable?
a complete/full outer shell
29. What is the molecular formula of the very common compound formed between hydrogen and oxygen?
30. How many more electrons does an oxygen atom need to get a complete outer shell?
2 more (it gains two electrons and becomes a 2- ion)