At STP, an element that is a brittle solid and a poor conductor of heat and electricity could have an atomic number of

(1) 12 (3) 16

(2) 13 (4) 17

How many atoms are in 0.31 moles

Many organisms in an ecosystem copete with each other for resources. What might different species of trees in a forest ecosystem compete for?

How many moles of oxygen atoms are present in 5 H20

Calculate the dipole moment for hf (bond length 0.917 å), assuming that the bond is completely ionic.

11. A proton is also known as this ion.

Describe the difference between gravitational force and strong nuclear force

How do you make an ionic compound neutral

Which sample contains the greatest number of atoms? which sample contains the greatest number of atoms? 14 gc 102 gag 49 gcr 202 gpb?

2NO2 (g) Equilibrium N2O4 (g) NO2 and N2O4 undergo the reaction shown. When a sealed container of NO2 reaches chemical equilibrium, which must be true? f The maximum number of molecules has been reached. g No N2O4 is present.

How does a scientist critique another scientist's conclusion? A. By ignoring the first scientists date B. By Criticizing the scientist's personal beliefs C. By performing more experiments D. By reading secondary sources