Is the elements position in a modern periodic table determined by its atomic number or its atomic mass?
Is the elements position in a modern periodic table determined by its atomic number or its atomic mass?
Atomic number and protons After the discovery of protons , scientists realised that the atomic number of an element is the same as the number of protons in its nucleus . In the modern periodic table, the elements are arranged according to their atomic number – not their relative atomic mass .
Which has a stronger electron attraction large atoms or small atoms?
Electrons close to the nucleus are held more closely to it by the electrostatic (Coulomb) force than those farther from it. Therefore, attraction for the electrons of another atoms is greater for smaller atoms than for larger.
What is the atomic number of a neutral atom with 53 protons and 74 neutrons?
The atomic number of iodine (53) tells us that a neutral iodine atom contains 53 protons in its nucleus and 53 electrons outside its nucleus. Because the sum of the numbers of protons and neutrons equals the mass number, 127, the number of neutrons is 74 (127 − 53 = 74).
Which class has greater ionization energies metals or nonmetals?
(B) Nonmetals have higher ionization energies because they are larger. than metals and harder to ionize.
Where are the metals located on the periodic table?
left
The metals are to the left of the line (except for hydrogen, which is a nonmetal), the nonmetals are to the right of the line, and the elements immediately adjacent to the line are the metalloids.
What does the position of an element in the periodic table tell you about its detailed atomic structure?
The position of each element in the table gives important information about its structure, properties, and behavior in chemical reactions. Specifically, an element’s position in the periodic table helps you figure out its electron configuration, how the electrons are organized around the nucleus.
Which group on the periodic table has the greatest metallic character?
Group 1 is the one on the periodic table which has the greatest metallic character and group 17 is the one with the lowest metallic character.
Where are the lowest electron affinity located on the periodic table?
What is the lowest electron affinity? Metals are more likely to lose electrons than they are to gain them. Of the metals, mercury has the lowest electron affinity.
Can you have 0 neutrons?
There is only one stable atom that does not have neutrons. It is an isotope of the element hydrogen called protium. Protium, which contains a single proton and a single electron, is the simplest atom.
Who discovered protons?
Ernest Rutherford
It is 100 years since Ernest Rutherford published his results proving the existence of the proton. For decades, the proton was considered an elementary particle.
Which group has the highest ionization energy?
the noble gases
The elements that belong to the noble gases or inert gases or (Group VIII-A) have the highest ionisation energy.
Which metal in the list above has the most metallic character explain?
Which metal in the list above has the most metallic character? Explain. Cesium – as the largest atom, the lowest ionization energy and the most reactivity with nonmetals. This can be determined by its position lowest in the alkali metal group.