Although Rutherford's model was highly successful, scientists realized that it was incomplete. For example, hydrogen atoms contain one proton, and helium atoms contain 2, yet a hydrogen atom has only 1/4 the mass of a helium atom.
I'm not comprehending what my textbook is trying to state in this short blurb.
It's trying to tell you (and not doing a great job of it) that the He atom must contain something not in the H atom. The H atom has 1 proton and the He atom has 2. Since the He atom weighs 4 times as much as the H atom, it must contain something else that contributes to the mass. In about 1932 the neutron was discovered and that's the magic answer. H atom has 1 proton with mass 1. He is 2 protons and 2 neutrons with a mass of 4.00.
Based on the law of definite composition, Dalton proposed that one atom of carbon combines with two atoms of oxygen to always produce CO2. Similarly,he proposed that two atoms of hydrogen combine with one atom of oxygen to give a
Dalton theorized that matter is made of tiny, indivisible particles called atoms. In what way did the theories of each of these scientists support or differ from Dalton’s theory? K/U (a) J. J. Thomson (b) Ernest Rutherford (c)
Mass of the Sun = 1.989 x 10^30 kg Mass of Hydrogen Atom = 1.00794 grams If we assume the Sun is made totally of hydrogen, how many hydrogen atoms are contained within the Sun? If the Sun converts hald of these hydrogen atoms into
how did the discovery of the electron change the atomic model? A.it disproved the earlier idea of an indivisible atom. B. it confirmed that atoms are very tiny. C.it exposed fradulent experiments conducted by unqualified
I thought i was done but I am confused on these two. 1. In a natom electrons are located in energy levels that are a certain distance from the nucleus. I put rutherford. and I am still left with atoms are small hard particles -
Joyce combines 9 atoms of hydrogen and 3 atoms of nitrogen to make 3 molecules of ammonia. write a direct variation equation which relates atoms of hydrogen to atoms of nitrogen. How many nitrogen atoms does Joyce need to form
Could someone help me with these questions. . . please 1. How does Rutherford’s model of the atom account for the back – scattering of alpha particles directed at the gold leaf 2. The higher the energy level occupied by an
If we assume the Sun is made totally out of hydrogen, how many hydrogen atoms are contained with the Sun? If the Sun converts half of these hydrogen atoms into helium over its lifetime of about ten billion years, how many hydrogen
an atom is made of a positively charged nucleus surrounded by a large region in whci hscientists can predict where an electron is likey to be found. I think this is attributed to rutherford choices are: rutherford, wave model,
Are these correct for Democritius Help so confused - I read site and still trying to figure out. atoms of same element are exactly alike an atom is mostly empty space with a dense - postiveily chareged nucleus These are the