Flashcards in group 1 (alkali metals) (C3) Deck (20):
how many electrons does the element have in its outer shell?
what colour do the elements turn universal indicator?
what 4 things happen the further down the group you go?
- atom size increases
- boiling point decreases
- melting point decreases
why is it easier to loose electrons than gain electrons?
because of the shielding effect of other electrons
what is there less of in these elements?
What are the first 3 elements in this group? (in order going downwards)
how do the elements react with water (which are less dense)?
When reacted with water what are the 2 products?
hydrogen and metal hydroxide
What is the word equation when lithium is reacted with water?
lithium + water -> hydrogen + lithium hydroxide
What is the balanced symbol equation for when lithium is reacted with water?
2Li (s) + 2H^2O (l) -> H^2 (g) + LiOH (aq)
what density do all the elements have?
a low density
which elements are less dense than water?
the first 3 (lithium, sodium, and potassium)
what do the elements react with?
when reacting with non-metals what kind of compounds are formed?
what charge do the ionic compounds have?
what colour are the compound solids?
when the compound solids are dissolved in water what colour is the solution?
what happens the further down the group you go?
the more shells of electrons
why do elements get more reactive the further down the group you go?
the layers of electrons shield the nucleus from reacting. the lone electron on the outer shell is further away from the nucleus. this means it becomes easier to loose an electron.