The element P has the atomic number 12. Element Q has the atomic number 16. What is the formula of the compund formed when these two elements react together? a. P2Q b. PQ c. PQ2 d. PQ3

Q: A certain element contains one atom of mass 10.013 ufor every four atoms of mass 11.009 u. Compute…

A: Given data contains, Mass of first isotope is 10.013 u. Mass of second isotope is 11.009 u.

Q: Calculate the number of atoms in sample. 5.18 g P

A: To calculate the number of atoms of 5.18 g P is given below as; The atomic mass of P is 30.97 g/mol…

Q: What are the properties of Metals and Nonmetals?

A: Elements are the class of pure substance that is made up of only one kind of particles. They can be…

Q: atom

A: An atom lose or gain electrons in order to attain noble gas configuration (stable configuration)

Q: Complete the following table for atoms of essential elements inthe body:

A: An atom consists of the nucleus at its center, and electrons revolve around the nucleus. The nucleus…

Q: How was the overall charge distributed in the plum pudding model?

A: The overall charge is evenly distributed in the plum pudding model.

Q: Why has the atomic model changed over time?

A: Atomic model are the model proposed by eminent scientist to explain the structure of the atom and…

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

A: The data given is,

Q: how would you describe the elements from group 1 to group 12 in the periodic table

A: To find: how would you describe the elements from group 1 to group 12 in the periodic table

Q: When two oppositely charged atoms are attracted to one another they form a ____________________.

A:

Q: How did Mendeleev come up with the first periodic table of the elements?   A:He estimated the number…

A: To explain: How did Mendeleev come up with the first periodic table of the elements.

Q: The isotope of an unknown element, , has a mass number of 78. The most stable ion of this isotope…

A: Given,  The mass number of an unknown element isotope is 78. The most stable ion of this isotope has…

Q: Periodic Table Matching - Part B Periodic Table Matching - Part C Argon (Ar.) A. Atomic mass is more…

A: Given, Elements from periodic table. We have to match the properties of each element with the given…

Q: + а. Bohr b. Dalton C. Rutherford d. Thomson 3. Which atomic model was the first to show a nucleus,…

A: 27) in the Given figure, the model of an atom was proposed by Thomson.

Q: 7) Summarize Dalton’s, Rutherford's and J.J. Thompson's atom models on your own words. You can draw…

A: Dalton’s atomic theory proposed that all matter was composed of atoms, indivisible and…

Q: A certain element exists as three different isotopes, 29.1% of all the isotopes have a mass of 75.23…

A: The average atomic mass can be calculated by using Following formula - AAM = (Mass of 1st isotope×%…

Q: What is the periodic table

A: The elements are the simplest chemical species, which has same number of protons in the atomic…

Q: B. Fill in the missing information in the table. You are not allowed to use your periodic Give 2…

A: We are given hints about elements belonging to a same group, we have to identify their group number…

Q: 21. What force holds electrons near the nucleus of the atom? A. Strong nuclear force B.…

A: From the concept of periodic trends of elements and atomic mass of elements the following questions…

Q: a. How many protons does this element have? b. How many neutrons does this element have? c. How many…

A: The atomic number of an atom is the number of protons present in the atom. For a neutral atom, the…

Q: What most likely explains why the chemical symbol for calcium is? A. The symbol was already used for…

A: Calcium is discovered by Humphry Davy in 1808. It belongs to group 2 of the periodic table with an…

Q: a. Explain how atoms of different elements differ from one another.b. Explain how atoms of different…

A: a).

Q: The Bohr model of the atom was an important discovery that led to the modern theory of atomic…

A:

Q: Use your periodic table to give an example of an element that is/has: a. A metal that is NOT a…

A: The periodic  table is first invented by mendeleev's scientists.  It is based on atomic mass of…

Q: The total number of atoms in 2FrCN

A: Total Number .of atom represents  Number of sum of all the element present in a given Compound .

Q: d. What is the charge for all of the elements in Group 2? e. What is the charge for all of the…

A: d) The general electronic configuration of group 2 elements is ns2. Thus they lose two e- and form…

Q: How is atomic number related to the identity of the atom? What might happen if the relationship…

A: The atomic number denotes  the number of protons in an atom of the element.

Q: Atoms in Element 3 Atoms in Total Atorns Total Atoms in Element 2 Molecule Atoms in Element 1…

A: Molecules are formed by constituent atoms arranged in specific ratio.

Q: According to Dalton's Atomic Theory: I. Chemical compounds are formed when atoms of different…

A:

Q: 1. Johanne Dobereiner noticed that when the elements in the atomic mass, the mass of the middle…

A: As you have posted a question with multiple parts, we will solve the first three subparts for you.…

Q: 13. 9.62 g of an element contains 0.240 mol. Identify the element. А. В В. Не С. Са D. Zr E. Both Ca…

A: Weight of an element = 9.62 g No. of moles = 0.240 mol

Q: What does the atomic structure or the atomic number tell us about the identity of an element?

A: We have to tell what does the atomic structure or the atomic number tell us about the identity of an…

Q: 46. The diagram at the right represents two adjacent atoms of sulfur. The measure ôf distance o yasl…

A: As per rule only the first question can be answered: Solution to Q 46) The covalent radius of S (rS)…

Q: 11. What was Rutherford's contribution to the atomic model? A. Electrons are not bound to the…

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

Q: Calculate the atomic mass of naturally occurring boron if 19.9% of the boron atoms are 510 B and…

A: The atomic mass of naturally occurring boron has to be given,

Q: D. List down 5 noble gases E. List down eight transition metals F. Aside from the noble gases, list…

A:

Q: Since there are many more Carbon-12 isotopes found in nature, the mass of Carbon-12 should carry the…

A:

Q: When was the first theory about the character of the atom developed? O a. some 100 years ago O b.…

A: Atomic theory is a scientific theory of the nature of matter, which states that matter is composed…

Q: What determines the element?

A: The substance which is formed from one type of atom is known as an element.

Q: Atomic Theory: Be able to describe and recognize each scientists contr to the atomic structure.…

A: Since you have posted question with multiple subparts as per guidelines we can answer only three per…

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: A helium atom consists of two protons, two electrons and Iwo neutrons. In the helium atom, the…

A:

Q: Discuss in chronological order the different atomic model.

A: Atomic models

Q: How the electrons are arranged around the nucleus of a phosporus

A: Electronic configuration: It is the representation of electrons that are present in the various…

Q: 6. Briefly explain (i) Thompson Experiment OR (ii) Rutherford Experiment emphasizing the…

A: After the discovery of cathode ray, various experiment on cathode ray was conducted to know the…

Q: What is a valence electron?

A: Valence electron is the electron which takes part in the bonding with other element. They are…

Q: How is the periodic Table arranged? (A) Horizontally ( B) Vertically (C) Atomic Mass. (D) Periods…

A:

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.