Chem Unit 5 part 1

What is the yellow group

Alkali Metals

what is the orange group

alkaline earth metals

What is the red group

Transition Metals

what is the pink group

boron family

what is the light purple group

carbon family

whats the dark purple group

nitrogen family

whats the purple/blue group

oxygen group/chalcogens

whats the teal group

halogens

whats the green group

noble gases

whats the red period called

Lanthanides

whats the green period called

actinides

whats the red group

metals

whats the yellow group

metaloids

whats the blue group

non metals

what is the modern periodic law

The periodic table is listed by the elements in order of increasing atomic number (the number of protons)

How does the modern periodic law differ from Mendeleev’s

Mendeleev ordered the elements by atomic mass.

What did Mendeleev do

built the framework of the modern table on atomic mass, leaving gaps and predicting properties of missing elements

What did Newlands do

first to arrange elements into a periodic table by increasing atomic mass; proposed the law of octaves

What did Döbereiner do

grouped similar elements into triads

What did Moseley do

He used X-ray spectra to order elements by atomic number instead of atomic mass

What is a stable octet

when atoms are chemically stable when they have eight electrons in their outer (valence) shell