What element has a complete outermost energy level and is found in the 3rd period

Is aluminum a liquid at 1000 kelvin

A 250.0 gram block is placed on a balance. The balance measures the mass of the block as 243.9 grams. What is the percent error of the block

Which type of bond would form between aluminum and iodine

1-bromodecane (C10H21Br) produces a mass spectrum with a parent molecular ion (M) peak at m/z 220 (100%). A peak at m/z 222 (98%) also appears in the spectrum. What causes this signal in the mass spectrum

The major anatomic difference in autonomic reflex arcs is that there are two sensory afferents. True or False

Science does not include beliefs or opinions theories laws conclusions

For which of the following reactions is ΔHrxn equal to ΔHf of the product? You do not need to look up any values to answer this question. Select all that apply.

You have three molecules of glucose (3C^6H^12O^6). How many carbon atoms do you have?

If the arrangement of atoms in a substance changes

A certain element x has four isotopes. 5.845% of x has a mass of 53.93961 amu. 91.75% of x has a mass of 55.93494 amu. 2.123% of x has a mass of 56.93539 amu. 0.2820% of x has a mass of 57.93328 amu. what is the average atomic mass of element x?