Who was the first scientist to propose that the atom had a dense nucleus which occupied only a small fraction of the volume of the atom?

How many atoms of neon (Ne) are in a 1452.96 moles sample of neon?

Answer the following and round to the correct number of significant figures (don't forget units). a) 0.02123 m + 1.12 m + 0.00123 m = b) 2.3 cm - 1.23 cm + 120 cm = c) 25,430 km - 3,500 km + 200 km = d) (1.21 x 105) x (2.6 x 103) = e) 7.13 mm x 9.

An atom is a small building block that forms matter. Many different models of an atom have been made over the years. Which of the following is NOT a reason why so many models of the atom have been made? A The atom has changed over the years.

Find the mass of 1.112 moles HF?

Identify the independent variable, dependent variable, and constant in the following problem: If you plant hydrangeas in your garden, will the flowers be pink or blue?

Identify and describe the appearance of the type of muscle tissue found in your heart

Calculate the coulombic force (in Newtons) felt by an electron and a proton separated by a distance of 1 angstrom. An angstrom is 10-10 meters.

Why does stirring increase the rate of dissolution? A. Stirring the solution decreases the kinetic energy of the solution. B. Stirring the solution increases the surface area of the solution. C.

How many moles of ba (oh) 2 are present in 275 ml of 0.200 m ba (oh) 2?

The molecular weight of vitamin C, CH06, is 176.12 8 mol What is the mass, in grams, of 0.000142 mol of vitamin C? Express the answer using 3 significant figures. 09