What is the mass of a neutron quizlet?
the mass of an atom should be nearly the sum of the masses of its protons and neutrons. the mass of a proton and the mass of a neutron are each very close to 1 amu.
Which statement best describes a property of a proton?
Solution: Protons are sub-atomic particles with a net positive charge equal to +1.6 × 10^(-19) Coulomb. Hence , “It has positive charge” : This describes the property of a proton.
Which of the following best describes atoms?
An atom is a particle of matter that uniquely defines achemical element. An atom consists of a central nucleus that is usually surrounded by one or more electrons. Each electron is negatively charged. The nucleus is positively charged, and contains one or more relatively heavy particles known as protons and neutrons.
Which statement best describes the density of an atoms nucleus?
6. Which statement best describes the density of an atom’s nucleus? a. The nucleus occupies most of the atom’s volume but contains little of its mass.
What best describes an atom that has gained one or more electrons?
an ion is an atom that has gained or lost 1 or more electrons.
How are electrons arranged around an atom quizlet?
When electrons occupy orbitals of equal energy, one electron enters each orbital until all the orbitals contain one electron with parallel spins. An atomic orbital may describe at most two electrons. Electrons enter orbitals of lowest energy first. The most stable arrangement of electrons around the nucleus of an atom.
How are the organization and structure of the periodic table related to electron Subshells?
The answer is rather simple, if you understand electron configurations: the shape of the periodic table mimics the filling of the subshells with electrons. The shape of the periodic table mimics the filling of the subshells with electrons. … The next two electrons, for Li and Be, would go into the 2s subshell.
How is the arrangement of the periodic table related to the electron arrangement in atoms?
Electrons occupy different energy levels, or shells. … Moving through the elements in the periodic table, each atom has one more electron than the last because the number of electrons is the same as the atomic number . Electrons occupy the shells in order, starting with the shell that is nearest the nucleus .
Which of the following statements about our understanding of the structure of the atom is true?
Among the given statements, the true statement about the structure of an atom is C. the nucleus contains protons and neutrons. Explanation: In an atom, the number of protons is not always equal to the number of neutrons in the nucleus of the atom.
Which one of the following statements correctly describes the relationship between an atom and an element?
which one of the following statements CORRECTLY describes the relationship between an atom and an element? An atom is the smallest unit of an element that demonstrates all of the properties of that element.
Which of the following statements correctly defines a molecule?
A molecule is a substance consisting of two or more different elements chemically bonded together. “Molecule” is another word for “atom.”
Are elements arranged by atomic mass?
In the modern periodic table, the elements are arranged according to their atomic number – not their relative atomic mass . … rows, called periods , in order of increasing atomic number. vertical columns, called groups , where the elements have similar properties.
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