Match these items with their correct definitions.

1 .
baking soda
last two horizontal rows on the periodic table
2 .
shell
elements to the left of the “stair-steps” in the periodic table
3 .
water
elements to the right of the “stair-steps” in the periodic table
4 .
nonmetals
hold the secret to chemical change
5 .
rare earth elements
path or orbit in which electrons whirl about nucleus
6 .
electrons
a common base
7 .
metals
h 2 o

City a and city b had two different temperatures on a particular day. on that day, four times the temperature of city a was 8â° c more than 3 times the temperature of city b. the temperature of city a minus twice the temperature of city b was â’3â° c. what was the temperature of city a and city b on that day? city a was 5â° c, and city b was 4â° c. city a was 3â° c, and city b was â’1â° c. city a was 8â° c, and city b was â’3â° c. city a was 5â° c, and city b was â’5â° c.

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.

Match the mixture with the substance// i really need on this guys (it’s a pic btw)