C2 periodic table
No description yet. This curated deck is ready for daily study.
Card preview (14)
Why is mendeleevs table so good?
-He placed them in atomic weight -Arranged periodically to show similar properties -Left gaps in the table for undiscovered elements and predicted what they would be like based on similar elements -Swapping out inconsistencies like argon and potassium so they can be in groups of elements with similar properties and not always based on mass
Properties of metals
-Electrical conductor -Ductile(drawn out to wires) -Malleable (bent with a hammer) -Higher melting/boiling point
What happens with electrons in group 5 6 7
They gain electrons to form ions anion( non metals) negative charge
What happens with electrons in groups 123
They lose to form cations (metals) positive charge
Why are the noble gases so stable?
They have a complete outer shell so there is no need for them to react.
Why does the boiling point get higher down the noble gases?
The atoms become larger. the intermolecular forces between the atoms become stronger. more energy is needed to overcome these forces.
What are properties of Group 1-Alkali Metals?
Soft and very reactive,Low density and shiny
Why do reactivity increase going down the alkali metals?
the atoms get larger. the outer electron gets further from the nucleus. the attraction between the nucleus and outer electron gets weaker – so the electron is more easily lost.
What do alkali metals react well with/
Group 7-Halogens example sodium+chlorine–>Sodium chloride or salt
Properties of Halogens
Low boiling/melting point Toxic Poor conductors
What would happen if you have potassium iodide and put it in chlorine solution?
The chlorine will displace the iodine from the potassium as chlorine is more reactive
Why does group 7 get less reactive when you go down?
They increase in electron shells; so the atoms are larger as you go down the group. Therefore, the attraction of the outer electron to the nucleus decreases as you go down group 7.
Properties of Transition Metals
Good conductors Hard and Strong High density High melting point Low reactivity
Why do transition element may have a roman numeral next to their name?
Because they can form more than one ion