Which contribution is a modification to Thomson's plum pudding model?

A-Atoms are indivisible.

B-Electrons are scattered in an atom.

C-A positively charged nucleus sits at the center of an atom.

D-Atoms of the same element have the same properties.

An element found in another galaxy exists as two isotopes. if 80.0 percent of the atoms have an atomic mass of 80.00 atomic mass units and the other 20.0 percent have an atomic mass of 82.00 atomic mass units, what is the atomic mass of the element?

In a controlled scientific experiment, A. all variables are kept constant. B. one or more variables are kept constant. C. no variables are kept constant. D. only one variable can be kept constant. Reset

10. Which kind of resource takes months, years, or decades to renew? a. Geothermal energy b. Fresh water c. Natural gas d. Minerals

If the molar mass of calcium hydroxide (Ca (OH) 2) is 74.1 g/mol, how many grams of calcium hydroxide are required to prepare 2.00 liters of 0.60 M calcium hydroxide

Which molecule is best described as energy rich because of the amount of energy that can be stored in it and released from it? A. CO2 B. ADP C. H2O D. C6H12O6

Which atom can bond with each other to form chains, rings or networks? (1) carbon atoms (2) hydrogen atoms (3) oxygen atoms (4) nitrogen atoms

How many electrons in an atom can have each of the following quantum number or sublevel designations? (a) 4p (b) n = 3, l = 1, m1 = + 1 (c) n = 5, l = 3

The ksp of copper (ii) carbonate, cuco3, is 1.4 * 10-10. calculate the solubility of this compound in g/l.

A 1.0857 gram pure sample of a compound containing only carbon, hydrogen, and oxygen was burned in excess oxygen gas. 2.190 g of carbon dioxide and 0.930g of water were produced. Find the empirical formula of the compound.

Can you solve the anagrams cduopomn yeproprt eeculomc mentag icatreno