atomic weight,relative atomic mass mass- the property of a body that causes it to have weight in a gravitational field combining weight,eq,equivalent weight,equivalent- the atomic weight of an element that has the same combining capacity as a given weight of another element; the standard is 8...
The nucleus is of a high specific weight; it contains most of the mass of the entire atom (its mass is considered equal to the atomic mass) and is composed of positively charged particles, called protons (the number of which always equals the atomic number, and particles of 0 charge, ...
Atomic mass, the quantity of matter contained in an atom of an element. It is expressed as a multiple of one-twelfth the mass of the carbon-12 atom, which is assigned an atomic mass of 12 units. In this scale, 1 atomic mass unit (amu) corresponds to 1.66
The constant refers to the number of atoms in a sample whose bulk mass in grams equals the relative atomic mass of the element. Kilogram to be redefined soon? Step 4: Relationship between molar mass and relative atomic mass was [sup.12]C Why is the number standing for molar mass in gram...
The neutron number, or number of neutrons, when added to the atomic number, equals atomic mass number. The protons and neutrons of an element's nucleus have essentially the same mass, so the atomic mass is often very close to the atomic number. ...
In a neutral atom, the number of protons equals the number of electrons in shells which is the energy level around the nucleus. Isotopes are atoms with the same atomic number but distinct neutron numbers, and hence distinct mass numbers. The average isotopic mass of an isotopic mixture for ...
(atomic number) determine the identity of an element. Atoms have no overall electrical charge so, an atom must have as many electrons as there are protons in its nucleus. The atomic number of an element also equals the number of electrons in a neutral atom of that element. Ex: Sodium ...
Mass Number Atomic Number equals the # of... NUCLEUS ELECTRONS PROTONS NEUTRONS NEGATIVE CHARGE POSITIVE CHARGE NEUTRAL CHARGE ATOM. Isotopes Atoms of the same element that different mass numbers The Atom. Number of Protons = Number of Electrons Number of Protons = Atomic Number Atomic Mass = Pr...
Mass number, in nuclear physics, the sum of the numbers of protons and neutrons present in the nucleus of an atom. The mass number is commonly cited in distinguishing among the isotopes of an element, all of which have the same atomic number (number of p
In neutral atoms the number of protons equals the number of electrons. Atom size (copy this slide) ? Electrons take up most of the space ? More protons and neutrons = bigger nucleus ? Put the following in order of size: ? Hydride ion (H-) ? Alpha particle (He nucleus) ? Helium ...