Periodic Table

3. Group 7 is a collection of ____ non-metals since they always exist as two atoms (a compound)
5. Group 1 metals have low melting points compared to most metals and as you go down the group, the melting points ____
7. Elements in the same periodic group have the same amount of ____ in their outer shell
11. Group 1 metals react vigorously with ____ to produce an alkaline solution and hydrogen gas
12. Non-metals form ____ ions by gaining electrons
13. Group 8 or 0 are ____, monoatomic gases as they don't easily form molecules because they have full outer most shells
14. Transition metals have variable oxidation states, which means they can form ions with different ____
15. Elements that have both metallic and non-metallic properties, such as silicon
17. The lower you go down Group 1, the more vigorous its reaction with water, producing more ____ of hydrogen

1. One of the properties of metal where it can be hammered
2. All metals have the ability to ____ electricity
4. From left to right elements change from ____ to non-metallic character
6. Metals form ____ ions by losing electrons
8. Metals with high densities, melting points and forming colored compounds and often act as catalyst are called as ____ elements
9. Group number shows the number of electrons in the ____ ____
10. Group 1 metals have low densities as they float on water. As you go down the group, its densities ____
16. Elements are arrange in order of ____ number and so that the elements with similar properties are in columns, known as groups
18. In Group 1, going down the group, the elements are easier to ____ electrons and form positive metal ions (cations)
19. Group 1 is a collection of relatively ____ metals showing a trend in melting point, density and reaction with water