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6. What is a group?
- Random elements together
- The columns in the periodic table
- The rows in the periodic table
7. Why was Newlands idea not accepted?
- Did not work after calcium
- Didn't leave any gaps
- Was not a respected scientist
8. Properties of group 7 elements
- Low density, not very reactive, react covalently
- React with metals to produce ionic compounds
- High density, highly reactive, react ionically with non-metals
9. How are the elements arranged in the periodic table?
- By atomic number
- By atomic mass
- By the number of electrons
10. 1 useful property of transition metals
- Good catalyst
- Poor conductor
- Highly reactive
- Easily obtained
11. Why are the more reactive elements higher up in group 7?
- The electrons are closer to the nucleus, stronger forces, easier to gain an electron.
- The electrons are further from the nucleus, meaning there is a weaker attraction so it is easy to lose an electron.
12. How where the elements arranged in the early periodic table?
- By atomic mass
- By atomic number
- Randomly
- By the number of electrons
13. Why are the alkali metals stored in oil?
- They would ignite in air
- They are highly reactive with water
- They are highly reactive with oil
14. What was Mendelevs idea?
- Rule of triads
- Organised elements in a repeating pattern and left gaps.
- Rule of octaves
15. Two differences of transition metals compared with alkali metals
- High melting point, stronger and harder
- Low melting point, softer and weaker
- More reactive
16. Why are the more reactive elements further down the group in group 1?
- The electrons are further from the nucleus, meaning there is a weaker attraction so it is easy to lose an electron.
- The electrons are closer to the nucleus, meaning there is a stronger attraction meaning it is easier to lose an electron
17. Properties of group 1 elements
- Low density, highly reactive, react covalently with non-metals
- Low density, highly reactive, react ionically with non-metals
- Low density, not very reactive, react ionically with non-metals
- High density, highly reactive, react ionically with non-metals