Identify the element by the orbital diagram. 1. __ __
1s 2s

2. __ __ __ __ __
1s 2s 2p

3. __ __ __ __ __ __
1s 2s 2p 3s

4. __ __ __ __ __ __ __ __ __
1s 2s 2p 3s 3p

5. __ __ __ __ __ __
1s 2s 2p 3s

6. __ __ __ __ __ __
1s 2s 2p 3s

Which of the following statements is not true? • a. covalent compounds have low melting and boiling points. • ob. covalent bonds between atoms of a compound are relatively weak compared to bonds between molecules. • c. covalent bonds occur between nonmetals. • d. covalent compounds are often gases or liquids.

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

Cryolite, na3alf6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. start this question by first balance the chemical equation.1.) balance the equation: - alo3(s)+naoh(l)+hf(> na3alf6+h2o(g). 2.) if 17.5 kilograms of al2o3(s), 51.4 kilograms of naoh(l), and 51.4 kilograms of hf(g) react completely, how many kilograms of cryolite will be produced? 3.)which reactants will be in excess, (al2o3, naoh, or hf) 4.)what is the total mass of the excess reactants left over after the reaction is complete in kg?