Groups in a Periodic Table Flashcards
(27 cards)
What is group 1 of the periodic table called?
alkali metals
What do alkali metals have in common?
physical and chemical properties
What are physical properties of an alkali metal?
are soft
low melting points
low densities
What are the chemical properties of alkali metals?
have one electron in their outer shell
What happens when an alkali reacts with water?
produces a metal hydroxide and hydrogen
Why does the reactivity of group 1 increase as you go down the group
atoms are larger
outer electron is further from nucleus
outer electron is lost more easily
What does group 7 contain?
non metal elements
What is Group 7 also called?
the halogens
What are the physical properties of group 7?
joined by a single covalent bond
Why does the melting and boiling ponds increase going down group 7?
molecules become larger
more energy
intermolecular forces become stronger
What are the chemical properties of group 7?
all have seven electrons in outer shell
What happens when halogens react with metals?
produce salt
How does halogens react with hydrogen?
produce compounds called hydrogen halides
How does fluorine react with hydrogen?
explodes in the cold and dark
How does Chlorine react with hydrogen?
Explodes with a flame or in sunlight
How does Bromine react with hydrogen?
Vigorous reacting with burning hydrogen
How does Iodine react with hydrogen?
Very slow reaction when heated strongly
What is the chemical test for chlorine?
Damp litmus paper is bleached white when placed in chlorine
What are halogens displacement reactions?
A more reactive halogen can displace a less reactive halogen from solutions of its salts
How can you determine a reactivity series?
can be produced by attempting some
displacement reactions
What is the trend of group 7
it’s atoms outer shells gain an electron and form negatively charged ions (anions)
What does Group 0 contain?
non metal elements
What is group 0 also called?
noble gases
What are the boiling points of noble gases?
low
