1. An element has a low ionization energy and a low electron affinity. What is it most likely to be? A) a halogen B) a Group 16 (VIA) element C) a noble gas D) an alkali metal 2. Suppose that three isotopes of element X are in nature as follows: ISOTOPE % ABUNDANCE 1 2 3 RELATIVE ATOMIC MASS 110.0 105.0 100.0 60.0 30.0 10.0 What is the relative atomic mass of the naturally occurring mixture of element X? A) 102.5 amu B) 105.0 amu C) 107.5 amu D) 315.0 amu

Q: Explain how it is possible for one element to have a higher atomic number than another and yet have…

A: Atomic mass of any element is actually its average atomic mass which is calculated by the addition…

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

A: The average atomic mass of an element is the sum of the masses of its isotopes, each multiplied by…

Q: What is the atomic weight of element X of an atom X-23 which have an isotopic mass of 23.02amu and…

A: The Atomic Weight of element X ofX23⇒23.02 amu isotopic mass ,X25⇒25.14 amu isotopic mass .

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: Complete ALL boxes in the table below. Number Number Number Number of Chemical name of valence…

A: NOTE: please note according to our policy , we can only answer first three subparts of a question.…

Q: ö: j y- :0 :0 :0= :o:

A:

Q: A nitrogen atom has 7 protons, and the most common isotope of nitrogen has 7 neutrons. A radioactive…

A:

Q: Match the correct isotope pairs: Atom A (5 protons, 5 neutrons, 5 electrons) Atom B (6 protons, 6…

A: Two or more forms of the same element that contain equal numbers of protons but different numbers of…

Q: Which pair of elements below would be the least similar in their chemical properties?  a) Be-Al…

A: Element in the same group have similar chemical properties. Also same pair of elements shows…

Q: Write the condensed ground-state electron configuration for each of the following elements

A: Electrons are filled in the sub-shells in increasing order of their energy i.e. lower energy…

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

A: Given that Isotope Mass (amu) Relative Abundance 100Ru 99.9 48% 99Ru 98.9 52%   To…

Q: An element has an atomic number of 35. If an atom of that element is in a form wherein it has a…

A: The given element has atomic number 35. If the element has -1 charge, it means that there is…

Q: Fill in the blanks 1. An orbital is the region in an atom where it's more likely (probably) to find…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: Determine the percent abundance for J-67 and J-68, given the following data: The average atomic mass…

A: The average atomic mass of the element J is 65.96amu.   Let the abundance of  J-68  is M %.…

Q: Match: 1. An atom's mass number mathematically equals 2. The total number of electrons in a(24Cr+³…

A: Here we are required to match the statement in column A and column B.

Q: Use the following information to complete the table below: • A new element: newyorkium with the…

A: Given that, We have to write the formula of the above given compound.

Q: A sample of the element Phosphorus is shown to have a mass of 33 and å charge of -3. HoW many…

A: Neutral Phosphorus having mass 30.9 P having mass 33. Atomic number of P is 15, also atomic number…

Q: Given the isotopic data determine the average atomic mass of the element.  1) Show the calculation…

A:

Q: Write the standard isotopic notation for the following atoms: a)80p, 80e,120n b)7p,7e,8n…

A: The standard isotopic notation of an isotope is written as follows:

Q: they all have different mass numbers. And the reason for having different mass numbers should be due…

A:

Q: Use the pHet simulation Isotopes to determine 2 stable isotopes for 3 of the above elements listed…

A: The periodic table is a tabular arrangement of chemical elements, organized based on their atomic…

Q: Which element is not a main-group element?a) Se                      b) Mo                     c) Sr…

A: Main-group elements: S-block and P-block elements are knows as main-group elements. They are,…

Q: Which of the following elements is largest in atomic size? A) Ba B) Ca C) Mg D) Be

A: The atomic size or radius of the element is said to be the distance from the nucleus of an atom to…

Q: Elements in group ________ have a np6 electron configuration in the outer shell. A)  4A B)  6A C)…

A: The answer is 8A. This is nobel gas family where Helium, Neon, Argon, Krypton etc. is part of it.…

Q: Finding atomic mass from isotope mass and natural abundance A robot spacecraft returned samples from…

A: Tin (Sn) is a chemical element found on the periodic table with the atomic number 50 and the symbol…

Q: b) Calculate the approximate atomic mass of potassium given this set of data: K- 39 92.36% K-40…

A: Average atomic mass: The average atomic mass of an element is the sum of the masses of its isotopes,…

Q: Consider the following data: isotope                  atomic mass                    abundancy%…

A: ANS. Option B) 31.19 amu

Q: Consider generic atoms A, Be C. It is known that the mass number of A is equal to 101, the mass…

A: The atoms which have the same number of the proton but the neutron number is different is called…

Q: Which element is radioactive semimetal? A) Tellurium B)polonium C)Antimony D)Francium

A: Semimetal : metalloids are known as semimetals  A) Tellurium : symbol : Te   Atomic number :  52. It…

Q: Isotopic Symbol electrons Format: X-# Element atomic # of # of # of mass Symbol number number…

A: There are different type of elements with Their different symbols. Some symbols derived from their…

Q: Fill in the blanks to complete the following table.   Row Element Name Element Symbol Atomic…

A: Element name in rows are: Row 1:  Ag is the symbol for silver, with atomic number 47. Hence, element…

Q: An element has 2 isotopes : The 1st isotope has the atomic mass of 154.2 amu and abundancy% of…

A: Recall the data, 1st isotope => 154.2 amu, %abundance=81.20% 2nd isotope=> 155.7 amu,…

Q: what element might you expect to be most similar to Sc in its chemical behavior? Why?

A: The element given is Sc i.e Scandium.

Q: a) Compare the number of protons, neutrons, electrons, and nucleons for the two isotopes: Li-6 Li-7…

A: Since you asked multiple questions so as per Q&A guidelines of portal I solve first question…

Q: List the general properties of metals, nonmetals, and metalloid elements found in the Periodic Table…

A:

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.