What element can be represented by 45 #n^o#, 34 #p^+#, 34 #e^.#?

Atomic Number 34 Belongs To

An element with the atomic symbol Se, atomic number 34, and atomic weight 78.97. It is an essential micronutrient for mammals and other animals but is toxic in large amounts. Selenium protects intracellular structures against oxidative damage. It is an essential component of. Best macbook os. Answer to: An elemental ion has 34 protons, 36 electrons, and 44 neutrons. What isotope is it? By signing up, you'll get thousands of step-by-step.

1 Answer

If there are #34##'protons'#, the element is unquestionably #'selenium'#.

Explanation:

The number of protons, the number of massive, positively charged nuclear particles, is #Z,'the atomic number'#. #Z# unequivocally defines the identity of the element. For #Z=34# we have selenium.

We can be even more specific than this, because the question reported the number of neutrons, the number of neutrally charged, nuclear particles, i.e., the #'^79Se# isotope, where the #79# superscript is the isotopic mass: #'neutrons + protons'#. And thus this isotope possesses #79-34=45' neutrons'#

The problem specified #'34 electrons'#, so we know that this is a neutral element. Why?

I haven't looked this up yet, but I think that this is a fission product, i.e. an unusual selenium isotope.

Related questions

Click a column header, such as Name, to sort the table by that item.
SEENotes at the bottom of the Table.

Notes:
• Density of elements with boiling points below 0°C is given in g/l. In a sorted list, these elements are shown before other elements that have boiling points >0°C.
• Earth crust composition average values are from a report by F. W. Clarke and H. S. Washington, 1924. Elemental composition of crustal rocks differ between different localities (see article).
• Group: There are only 18 groups in the periodic table that constitute the columns of the table. Lanthanoids and Actinoids are numbered as 101 and 102 to separate them in sorting by group.
• The elements marked with an asterisk (in the 2nd column) have no stable nuclides. For these elements the weight value shown represents the mass number of the longest-lived isotope of the element.

Abbreviations and Definitions:

Atomic Number 34 Element

No. - Atomic Number; M.P. - melting point; B.P. - boiling point

Atomic number: The number of protons in an atom. Each element is uniquely defined by its atomic number.

Atomic mass: The mass of an atom is primarily determined by the number of protons and neutrons in its nucleus. Atomic mass is measured in Atomic Mass Units (amu) which are scaled relative to carbon, ¹²C, that is taken as a standard element with an atomic mass of 12. This isotope of carbon has 6 protons and 6 neutrons. Thus, each proton and neutron has a mass of about 1 amu.

Isotope: Atoms of the same element with the same atomic number, but different number of neutrons. Isotope of an element is defined by the sum of the number of protons and neutrons in its nucleus. Elements have more than one isotope with varying numbers of neutrons. For example, there are two common isotopes of carbon, ¹²C and ¹³C which have 6 and 7 neutrons respectively. The abundances of different isotopes of elements vary in nature depending on the source of materials. For relative abundances of isotopes in nature see reference on Atomic Weights and Isotopic Compositions.

Atomic Number 34

Atomic weight: Atomic weight values represent weighted average of the masses of all naturally occurring isotopes of an element. The values shown here are based on the IUPAC Commission determinations (Pure Appl. Chem. 73:667-683, 2001). The elements marked with an asterisk have no stable nuclides. For these elements the weight value shown represents the mass number of the longest-lived isotope of the element.

Atomic Number 34 Valency

Electron configuration: See next page for explanation of electron configuration of atoms.

Ionization energy (IE): The energy required to remove the outermost electron from an atom or a positive ion in its ground level. The table lists only the first IE in eV units. To convert to kJ/mol multiply by 96.4869. Reference: NIST Reference Table on Ground states and ionization energies for the neutral atoms. IE decreases going down a column of the periodic table, and increases from left to right in a row. Thus, alkali metals have the lowest IE in a period and Rare gases have the highest.

Other resources related to the Periodic Table

Selenium Mass Number

• Chemical Evolution of the Universe