The nucleus of an atom: Each atom has a nucleus at approximately the centre of its volume consisting of the two types of particles called protons and neutrons. Protons and neutrons are known collectively as nucleons. Neutrons have no charge and protons have a charge of +1 (that is, they ...
What is the density of metallic hydrogen? An atom of rhodium (Rh) has a diameter of about 2.7 \times 10^{-8} cm. How many Rh atoms would have to be placed side by side to span a distance of 4.5 micrometers? If the atom is assumed to be a sphere, what is the volume (in m^...
What is the average mass of a single silicon atom in grams? What is the definition of atomic size in chemistry? An atom has 20 electrons and 20 neutrons. What is the mass of this atom? What is an atom? How many hydrogen atoms would have the same mass as one calci...
(ii) The first excitation energy of the hydrogen atom is 10.2 eV.Explain what is meant by this statement. 相关知识点: 试题来源: 解析 The energy required by the hydrogen atom for it to transit from the ground state to its first excited state is 10.2eV. ...
Chemistry is the branch which deals with the detailed study of matter, its properties, how and why atoms/substanced combine or separate to form other substances. Understand all the basic concepts of Organic, Inorganic, and Physical Chemistry with detaile
It is the transfer of four atoms – one carbon atom and three hydrogen atoms (CH3) – from one substance to another. The addition of methyl groups can affect how some molecules act in the body. What is methylation in the body? When optimal methylation occurs, it has a significant ...
Most of an atom is empty space. If an atom were about as big as a baseball stadium, the nucleus would be the size of a pea in the very center and the electrons would be somewhere on the outside edge.What makes an atom of gold different from an atom of iron is the number of ...
LAKHMIR SINGH & MANJIT KAUR-STRUCTURE OF ATOM-Exercise Name the particles which actually determine the mass of an atom. 01:48 Name the positively charged particle present in the atoms of all the e... 01:18 What is the electronic configuration of a hydrogen atom ? 01:23 How many times ...
A hydrogen atom is in the 6 g state. What is the energy of the atom? An electron in the hydrogen atom has a speed of 2.2 x 10^6 m/s. By how much does the energy and momentum differ from the Newtonian prediction? What is a hydrogen-like atom, and how are the energie...
What is green hydrogen, blue hydrogen, and so on? Producing hydrogen takes energy because hydrogen atoms don't exist on their own — they are almost always stuck to another atom, often another element. (On earth, hydrogen is particularly abundant in the form of water, or H2O.) Creating pu...