How are the helium atoms in this model different from real helium atoms?

where are the first repost of new scientific discoveries published A.) Internet Sites B.) Magazines C.) encyclopedias D.) Scientific journals

Which element in the second column of the periodic table is likely to be the most reactive?

Which conclusion is based on the "gold foil experiment" and the resulting model of the atom? (1) An atom is mainly empty space, and the nucleus has a positive charge. (2) An atom is mainly empty space, and the nucleus has a negative charge.

When benzene (c6h6) reacts with bromine (br2) bromobenzene (c6h5br) is obtained: c6h6 + br2 → c6h5br + hbr what is the theoretical yield of bromobenzene in this reaction when 30.0g of benzene reacts with 65.0 g of bromine? b.

A mixture of alcohol and water is homogeneous while that of oil and water is heterogeneous. explain

100 ml oxygen at 1.75 atm and 200ml nitrogen at 0.6 atm are passed to a 500 ml vessel. Calculate the total pressure of the mixture in the vessel at same temperature

Which is the best metal to use in an alloy to increase its electrical conductivity

Ice does not need to melt into liquid water before it can return to the atmosphere as water vapor. a. True b. False

How much ice at a temperature of - 17.5 ∘C must be dropped into the water so that the final temperature of the system will be 31.0 ∘C?

Why does a gas fill completely the vessel in which it is kept?