可否翻译出原体,在给出英文答案?1.What is a proton,neutron,and electron?2.What is an element,mixture,molecule,and compound?3.What will determine if an object will float if is placed in a fluid?4.What is the unit of energy used in electricity bills?How many joules is this equal to?(Can...
element vs. compound Anelementis a substance that cannot be separated into simpler substances by chemical means. An element consists of anatomwith a unique combination ofprotons,neutrons, andelectrons. For example, the element hydrogen has one proton, one neutron, and one electron. We cannot use ...
An atom with a positive charge has: A. more neutrons than protons B. more protons than neutrons C. more electrons than protons D. more protons than electrons E. equal numbers of proton, electrons, and neutrons What is a metallic atom? What is the name of the element that has an atomic...
element determines its atomic number, Z. Hydrogen is the lightest element and has one proton (Z = 1); uranium is the heaviest naturally occurring element and has 92 protons (Z = 92). Each proton, which is assigned a mass of 1.00728 atomic mass units (amu), has a charge designated as...
All atoms of a given element are exactly alike and atoms of different elements are different. In 1897, the English scientist named J.J. Thomson provided the first hint that an atom is made of even smaller particles. Can we see an atom? Atoms are really small. So small, in fact, that...
A proton is a subatomic particle found in the nucleus of atoms that differs from the other subatomic particles (called neutrons) in the nucleus of most atoms because each proton has a positive charge of +1 (as opposed to neutrons, which have no charge).
Every time you have one more proton you have another element, and then — oops — there'd be an atomic number for which there was no known element. And the uh prediction was that an element with that atomic number existed somewhere, but it just hadn't been found yet. And its location...
An isotope is a variant on an element that has a different atomic weight from other variants. Except for the commonest form of hydrogen— which has only a proton— every atomic nucleus in normal matter is made of both protons and neutrons. Isotopes of a given element have the same number...
Each element is classified by the number of protons in its nucleus, known as its atomic number. The number of neutrons in the nucleus can vary, creatingisotopes. Isotopes will have the same chemical properties, but different physical ones. For example, common hydrogen has one proton and no ne...
In ionic bonding, an atom donates one or more electrons to another atom of a different element, normally in such a way that both achieve full outer shells. Since an atom normally has the same number of electrons as protons, it is electrically neutral, but losing or gaining some will give...