Which of the following elements is stable? O Sodium in group 1 Aluminum in Group 13 O Chlorine in Group 17 Argon in Group 18

Q: Lithium has two stable isotopes, 6Li and 7Li. If a sample is composed of 48.0% of the lighter…

A: Average mass of an element is defined as the atomic mass of the element calculated by multiplying…

Q: Which of the following atoms is smallest? O Mg O F ON ΟΚ

A: Variation of atomic size in groups :-  Down the group atomic size increases because down the group…

Q: Family # of Valence E- Reactivity Metal/Nonmetal Alkali High reactivity Metals Halogens Noble Gases

A:

Q: Ph 2. (Across) Heaviest element that a star can fuse. (symbol) Ph 4. (Across) In IUPAC naming this…

A: Since you have asked multiple questions that are different, we will solve only one question for you…

Q: An Element from Group 1A and Group 7A (Periods 2-6) shared a Chemical Bond which formed a solid…

A: Here is the answer

Q: following compounds. 1. KCIO, 2. FeCl, 3. HIO, 4. Na,SO, 5. Н.РО, 6. ZnCl, 7. Si,N, 8. ΗΝΟ , 9. CCI,…

A: Answer  Name of the following compound

Q: In what physical state does chlorine exist at −65°C?

A: The physical state of an element depends upon its boiling point and melting point temperatures.

Q: (b) H2S to SO,² (acidic) Atoms: Oxygen: Hydrogen: Electrons:

A: The given half reaction is  H2S→SO42- in acidic medium.

Q: Use the incomplete reaction to complete the activity. Ba(ClO3)2 → ____ + 3O2 In one or two…

A: We are given an incomplete reaction, it can be completed as follows:

Q: The mass spectrometer may be used to A. Electrolyze water B. Detect the presence of isotopes C.…

A: We need to find where mass spectrometry can be used.

Q: Element X combines with phosphate ion to form X3(PO4)2. Element X is  A. Ca+2 B. Al+3  C. N-3 D.…

A: Given: Element X combines with phosphate ion to form X3(PO4)2 To identify Element X

Q: lon number of number of number of same number of protons electrons electrons electrons as gained or…

A: Complete the table given,

Q: 1) Elements are made from a single type of Compound Molecule Atom Proton Chemical Advertisement…

A: Element is a substance whose atoms have same number of protons. It cannot be decomposed into much…

Q: the number of electron domoins hy bridiea tio What is on the Or Cent ra l ond in p Brg? atom it

A: valence electrons on P = 5 Electrons on 3 Br atoms for bonding = 3 Total electrons = 8 Electron…

Q: Y What element is represented in question 33? O Sodium O Boron O Carbon O Sulfur

A:

Q: Which of the following elements is a good conductor of heat and electricity? neon chlorine carbon…

A: Substance having free electrons undergo movement, By movement they conduct electricity.  These free…

Q: which group of elements is the most reactive which group of elements is the least reactive 

A: Reactivity refers to the ability of an element to participate in chemical bond formation either by…

Q: Complete the following chemical equations.a. Na(s) + H 2 O(l) →b. K(s) + H 2 O(l) →

A: The complete chemical equation has to be given.

Q: Determine the balanced reaction of element A (white circles) with element E (gray circles) as…

A: According to the question, wight circles represent element A, gray circles represent element B. From…

Q: Which two elements on the periodic table are in the same period? O Sn and Rb O K and Ba O F and Cl O…

A: The periodic table is divided into 18 groups and  7 periods.(i)  The 18 vertical columns that goes…

Q: In the following set, indicate the most reactive element. P     Ar      S

A:

Q: (b) 4 CH,NH,(g) + 9 0,(g) → 4 CO,(g) + 10 H,O(€) + 2 N,(g) (c) Fe,0,(s) + 4 CO(g) → 3 Fe(s) + 4…

A: The standard free energy is denoted by the symbol ∆G∘. It is change in free energy which takes place…

Q: The chemical formula Al2O3 indicates: A) Five atoms of each element B) Two atoms of aluminum and…

A: Solution Alumina is often termed as corundom that synthetically produces corundom. it's a substance…

Q: What is the most reactive metal to least reactive metal out of: Zinc Tim  iron  magnesium…

A: Metals are good conductor of heat and electricity for example: aluminium, copper whereas non metal…

Q: Below is an abbreviated form the Periodic Table. O Periodic Table of the Elements Mg K Rb Cs Ba Ni…

A: Reactivity of the elements decreases from left to right across the period in the periodic table.…

Q: Which of the following elements would have chemical properties similar to Ca   K, Ba, Kr, or Sc

A: Elements from same group have same chemical properties

Q: Unit 9: Compounds - PS How many atoms of aluminum (Al), sulfur (S), and oxygen (0) are in each…

A: Given compound has molecular formula , Al2(SO4)3

Q: Element X has an unstable nucleus due to an overabundance of neutrons. All are likely to occur…

A: Element X has an unstable nucleus due to an overabundance of neutrons. All are likely to occur…

Q: Determine the number of atoms of each element in the following molecules. Write the element symbol…

A: The molar mass of the given compound is as follows: K2CO3

Q: what element would you expect to be very stable and unlikely to react with other elements

A: Given property of the elements,       Very stable and unlikely to react with other elements

Q: MCQ 111: Halogens are the elements of A. Group-II B. Group-VII C. Group-II D. Group-IV

A: Answer B) - Group VII Halogen present in group VII

Q: How are elements heavier than helium formed in the stars, particularly until iron?  How are elements…

A: The chemical element helium has the atomic number 2 and the letter He in its name. It is the first…

Q: 79) 79.) In each of the following groups,which element is leost reuctive? Group ! a. b.Group 7 C.…

A: The most fundamental classification of the chemical elements is into metals and non-metals. Metals…

Q: Lithium occurs naturally as 6-Li and 7-Li. Which isotope is more abundant? a)lithium 5 b)lithium 6…

A: li 7 atom is more stable isotope . 92.5 natural abundance

Q: What is the differences between an Oxygen atom (16 amu, atomic number = 8) and a Calcium atom (46…

A: Oxygen atom = 16amu Calcium atom = 40amu  Metal- it have tendency to lose electron. Non metal - it…

Q: E is a made up element and contains 6 valence electrons Y is a made up element and contains 7…

A:

Q: Nitrogen atoms on a distant planet have two dominant isotopes: 69.9% 14N (atomic mass 14.003

A: Given data is  N14 Atomic mass= 14.003 g/mol, abundance= 69.9%  N15 atomic mass = 15.000 g/mol,…

Q: Determine the number of atoms of O in 22.6

A:

Q: 17. How many atoms of silver are present in a 75 gram pure sample? c. 1.34 x 10-20 d. 4.87 x 10-27…

A: Since you have posted multiple questions , as per guidelines we can answer one per session . If you…

Q: The noble gases tend to not participate in chemical reactions. Some of the noble gases are Select…

A: We have given  The noble gases tend to not participate in chemical reactions. Some of the noble…

Q: The presence of 1 nitrogen atom in a compound results in an odd mass for the parent ion because A)…

A: In mass spectroscopy we use this nitrogen rule to determine the presence of nitrogen atom in the…

Q: The following table gives numbers of electrons, protons, and neutrons in atoms or ions of a number…

A: An element's fundamental unit is the atom. An atom is a unit of matter that cannot be broken down…

Q: Calculate the number of atoms in a 2.70×1032.70×103 g sample of strontium. number of atoms:

A: Gram atomic mass of strontium is 87.62 g.

Q: what is the physical state of element C? what is the physical appearance of element C? what is the…

A:

Q: What is the relationship between an atoms number of electrons and its relative stability

A: The electrons of the outermost energy level determine the energetic stability of the atom and its…

Q: In the following set indicate the most reactive element.    P          Cl                 Ar…

A:

Q: Which of the elements listed below has a lower ionization energy? * Oxygen Carbon

A: Oxygen and Carbon have 6 and 4 electrons in their outermost orbit. The nuclear charge of the atoms…

Q: 14p 14 n

A: The Given atom is Silicon

Q: (A) if both sentences are true, (B) if both sentences are false, (C) if the first sentence is true…

A: Since you have posted a question with multiple sub-parts,we will solve first three sub-parts for…