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What is the atomic structure of chlorine?
Chlorine has 17 protons and 17 electrons in its atomic structure. It has 17 neutrons in its most common isotope, chlorine-35, giving it a total atomic mass of approximately 35.5 atomic mass units. Chlorine is a halogen element with a valence shell configuration of 2-8-7.
What is the atomic and mass number of potassium?
The atomic number is 19 and the mass number of its most abundant isotope K-39 is 39 (19 protons + 20 neutrons) while the mass of that isotope is 38.96371 a.m.u.The relative atomic mass of the element potassium, K, is 39.10 g/mole.
How many neutrons does an atom of nitrogen have?
The most common isotope has 7 neutrons. To calculate this, look up the element on a periodic table, subtract the atomic number from the atomic weight, and round to the nearest whole number. Nitrogen, for example, has an atomic number of 7 and an atomic weight of 14.006. 14.006 - 7 = 7.006, which rounds to seven. Most of the low numbered elements have a number of neutrons equal to their atomic number, but the ratio starts to vary in the heavy elements. >>M.T.<<
What is the atomic number for calcium?
The most common calcium isotope, calcium-40, has 20 neutrons.
What are the two most common gases in the earth's amosphere?
The two most common gases in Earth's atmosphere are nitrogen (approximately 78%) and oxygen (approximately 21%).
What is the range of the radii of most atoms in nanometers(nm)?
The atomic radii of most chemical elements are in the range 75-250 pm or 0,075-0,25 nm.
What is the range of the radii of most atoms in nanometers (NM)?
It is between 1 and 55 Angstroms.55 Angstroms equates to 5.5 nanometers.
How can you use the periodic table and electron configurations to predict relative atomic radii and ionization energies for two atoms?
in a periodic table1>from left to right across a periodic tableionization energy increases & atomic radii decreases2>from top to bottom along a groupionization energy decreases and atomic radii increaseswhen considering the periodic table from left to right the main energy level is the same,but the number of electrons and protons increases.so the nuclear attraction increases and thus the electrons are pulled closer towards the nucleus.this decreases the atomic radii and increases the amount of energy needed to remove the electron in the outer most shell from the strong attraction.that is the ionization energy increases and atomic radii decreases when going from left to right across the periodwhen going down the group in a periodic table the electronic configuration of elements increases by 1 shell.that is the number of main energy levels increases.so the nuclear attraction between the atomic nuclei and the last electron decreases due to the increase in the distance.therefore it is more easier to remove the electron in the outer most shell of an element than that of the element immediately above it.therefore the ionization energy increases down the group.and since number of energy levels increases the atomic radius increases.
What periodic trends exist for atomic radii?
As you move across a row on the periodic table, the atomic radii becomes smaller due to the attraction between positive protons and negative electrons. As you move down a column, the radii increase due to the addition of valance electrons.
What is the atomic mass of fermium?
The most stable fermium isotope, 257Fe, has an atomic mass of 257, 095 105.
What is the atomic mass of roentgenium?
The atomic mass of the most stable isotope of Roentgenium is 281. This most stable isotope decays in around 36seconds. Oddly, it's most stable isotope has the same atomic mass as the most stable isotope of the element before: Darmstadtium.
What is the atomic mass of dubnium?
The atomic mass of dubnium (Db) is approximately 268. It is a synthetic element with an atomic number of 105.
What is the atomic mass for Francium?
The atomic mass of the most stable and common isotope of francium, 223Fr, is 223,019 735 9(26).
What is the Atomic Mass of fluorine?
The atomic mass number for fluorine is 18.9998, rounded to 19. Most fluorine is 19F but some is 18F with a half-life of 109.77 minutes.
What is hydrogens atomic weight?
for most scientofic purposes it is 1 amu (atomic mass unit). This comes from 1 proton and zero neutrons. The average atomic mass is 1.00794 amu.
What is the mass of radium?
The atomic mass of radium is approximately 226 atomic mass units.
What is the range of the radii of most atoms in nanometers?
The diameter of an atom is between .1 and .5 nanometers. A nanometer is one billionth of a meter. The diameter of atoms varies depending on the element.
