Explain how it is possible for one element to have a higher atomic number than another and yet have a lower atomic mass, for example,   element                       atomic no.                   atomic mass                                         K                                 19                                39.10                                      Ar                                 18                                39.95

Q: Bromine is the only nonmetal that is a liquid at room temperature. Consider the isotope bromine-81,…

A: The isotope given is 8135Br.

Q: Classify each of the following amines as primary, secondary or tertiary. CH₂ -NH- CHỊCH,CH, CHINH, |…

A: RNH2 = Primary, because N-atom is linked to one alkyl group(R) and two H-atoms.R2NH = secondary…

Q: Determine the number of protons, number of electrons, number of neutrons, atomic number, and mass…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Use the information given below to calculate the average atomic mass of element X.

A: The data given is,

Q: What atoms are in period 4, group 6A? What atom is in period 2, group 6A?

A: The periodic table is a tabular display of the chemical elements which are arranged by atomic…

Q: 1A H2A tant Values if needed for this question. 1B 28 Al 3A 4A 5A 6A 7A He BCN OF Ne Si P S Cl Ar Li…

A:

Q: On another planet, the isotopes of titanium have the given natural abundances. Isotope Abundance…

A: The average atomic mass of three isotopes can be calculated using the following expression:

Q: O protor neutro O electr O none

A: protons   The chemical properties of an element are determined by the subatomic particle…

Q: A 4570 g sample of an element contains 5.009x10^25 atoms. Identify the element.  - Fe - V - Cr -…

A:

Q: A 25g sample of an element had 2.895x 10^23 atoms. Identify it

A: Given: mass of element = 25g number of atoms = 2.895 x 1023 To determine: The identification of the…

Q: Calculate the atomic mass of the element: Mass                Abundance 22.1760             45.00%…

A:

Q: What provides the atomic mass? O number of the individual particles in the individual atom of an…

A: Basic definition and formula of atomic can determine the protons and neutrons because of..... A= Z+…

Q: Does any element with Z ≤ 92 match the description? A halogen with a lower atomic number than…

A: The question is asking if there is a halogen element with an atomic number (Z) less than or equal to…

Q: There are only two naturally-occuring stable isotopes of boron, the masses of which are listed in…

A:

Q: What do you mean by deuterium ? how it is symbolized ?

A: Given term,           Deuterium

Q: An atom of gadolinium has an atomic number of 64 anda mass number of 153. How many electrons,…

A: Gadolinium element belongs to the F-block element with the atomic number 64 and atomic mass 153 g.…

Q: There are two naturally occurring isotopes of silver that exist in approximately equal proportions.…

A:

Q: How many electrons, neutrons and protons would be found in an atom of oxygen-14 (atomic number 8)?

A:

Q: Calculate the average atomic mass of magnesium, given the information below.

A:

Q: What is the atomic weight for the element that is in group 5A and period 4?

A: given: group 5A period 4

Q: Three naturally occurring isotopes of an element are shown in the models below. What do the isotopes…

A: Isotopes are the atoms of same element having same atomic number (Z) but different mass number (A).

Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

A: Mass number describes the approximate mass of the nuclues of a single atom, but average atomic mass…

Q: Complete the following table. Atom /Ion protons neutrons electrons 30 34 30 12 12 12 16 16 16

A:

Q: Carbon, nitrogen, and oxygen have atomic numbers of 6, 7, and 8.  How many neutrons are in their…

A: Given: The atomic numbers of carbon, nitrogen, and oxygens are 6,7, and 8. We have to find the…

Q: On a mission to a newly discovered planet, an astronaut finds gallium abundances of 60.11 %% for…

A: The average atomic mass of an element can be calculated as shown below.

Q: What are the two different notations for an element with 6 protons, 6 electrons, and 8 neutrons?

A:

Q: Which element is in Period 2 group 4A? Which element is in Period 4 group 2A

A: In modern periodic table there are 7 horizontal rows which are called periods There are 18 vertical…

Q: Atomic mass-> 12 6 Atomic number → O 16 O 17 O 15 O 5 16 O 32 O 8 1 1 H 14 7 N 32 16 Using the…

A:

Q: There are electrons, _protons, and_neutrons in an atom of 146C. O 6, 8, 6 O 6, 6, 14 O 6, 6, 8 O 6,…

A: Carbon -14  Atomic number -6  Mass number -14  No. Of electrons = No. Of protons = Atomic number = 6…