why the discovery of noble gases was late?

Q: 10:51 1 l LTE [cK-12 License 13. The atoms in the air are called. , and they are very a. noble…

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Q: 19. What is an ion?

A: Ions constitute the ionic compounds. Sodium chloride is an example of ionic compound which contains…

Q: Atomic number for Uranium is 92 How many protons, electrons, neutrons in Isotope U-92?

A: Answer - According to the question - Atomic no. of uranium, Z=92    No. of protons =Z=92   No. of…

Q: Define the atomic mass unit. What were the benefits of developing the atomic mass unit as a standard…

A: Atomic mass unit is defined as 1/12 of the mass of a C-12 atom.  OR 1 amu is the average of the…

Q: process

A: Dear student I have given answer to your question in the image format.

Q: Determine whether each of the following statements is trueor false. If false, correct the statement…

A: An atom is the “smallest unit in an element”, this was until the discovery of the sub-atomic…

Q: Discuss Neutron-to-Proton Ratio?

A: In an atom, the atomic number indicates the number of protons present in an atom of an element. The…

Q: List the physical properties of elements?

A: Physical properties of elements are : Physical state Density Boiling point Melting point Specific…

Q: On a sheet of paper, Illustrate the history of the atom. Indicate the scientist's name, the Time…

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Q: What is an atom composed of?

A: an atom composed of :

Q: define atomic mass and atomic number?

A: Atomic mass is the quantity of matter contained in an atom of an element. It is expressed as a…

Q: How are the isotopes of an element different from one another?

A: Isotopes are atoms of the same element which are different in mass. That means They have the same…

Q: will be closest to which value? (A) 35 (B) 36 (C) 37 (D) 38

A: Isotopes are defined as same atoms having same atomic number but different mass number.

Q: circles represent helium atoms; the dark circles represent argon atoms. Select one: a. b. d. It is…

A: Applying concept of partial pressure.

Q: Explain the relationship between an atom’s number of electrons and its relative stability.

A: Octet rule:  An atom having eight electron in its outermost shell is said to be relatively more…

Q: Suppose that you face a problem similar to Mendeleev: You must predict the properties of an element…

A: The properties of an element are determined by the protons, neutrons and the electronic…

Q: II. Complete the following table by listing the contributions of the scientists to the understanding…

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Q: Which of the following would have similar properties to those of neon?  Answer choices in the…

A: The atom which is having same number of valence electron as that in Ne or is present in the same…

Q: Process wherein light elements such as helium and hydrogen form.

A: Process by which, Light elements such as helium and hydrogen form is?

Q: Atomic # for uranium is 92 how many protons, electrons, neutrons in isotope U- 96?

A: Given that, Atomic number of U is 92.

Q: Atomic #- 10 Mass #- 20 # of p+ = # of n - # of e-D # of valence e Atom Symbol- Name of Atom

A: Atom contains sub atomic particles  such as  protons , electrons and neutrons

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: Which element is a halogen? (a) Ne (b) O (c) Ca (d) I

A: The substances that have a tendency to occupy space are considered as matters. The matters can be…

Q: Atoms with the same number of protons but with different electrical charges _____.

A: Electric Charge is two types.    Positive charge Cation and negative charge anions

Q: What is the chemical formula for Bismuth(V) Sulfate? Thanks!

A: Chemical formula of Bismuth Sulfate is

Q: Describe Thomson’s model of the atom. How might itaccount for the production of cathode rays?

A: The atomic model proposed by Thomson was the plum-pudding model. According to Thomson's atomic…

Q: 2. These images were taken here on Earth. What do you think caused these formations?

A: As here action of water is present ,so I'm taking this in chemistry subject.   Images taken by…

Q: What are alums? Give examples other than potassium alum.

A: Double salts are the salts that dissociate into all its constituent ions completely. Example is Mohr…

Q: atoms of hydrogen (H

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Q: What element is x? O Mercury O Bromine O Rhodium O Xenon O Ytterbium

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Q: What is the mass number of potassium-39? What is the isotope’s charge?

A: Given atom,      Potassium-39   For a neutral atom, atomic number = Number of protons = Number of…

Q: the element manganese (Mm

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Q: element 'X' is

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Q: Explain how Dalton’s atomic theory accounts for the law of conservation of mass?

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Q: What is the relationship of hydrogen's mass to hindenburg tragedy?

A: The Hindenburg tragedy is the result of combustion of hydrogen. Water (vapor) is obtained as…

Q: Boron-10 and boron-11 are the naturally occurring isotopes of elemental boron. If boron has an…

A: Boron-10 and boron-11 are the naturally occurring isotopes of elemental boron. If boron has an…

Q: How are calcium and phosphorus related?

A: In comparison with calcium, plasma phosphorus exists in both organic and inorganic forms, including…

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: noble gases are also considered to be rare gases. why?

A: Helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn) are called rare gases…

Q: What did the scientists who are credited with discovering the proton and neutron have in common?

A: Solution Ernest Rutherford determined that his scintillation detectors detected gas nuclei once a…

Q: What is the abundance of beryllium-10 ?

A: Isotopes are atoms of same elements which have same atomic number but different mass number. In…

Q: The nucleus of an atom has a positive charge.

A: Answer - Atomic nuclei consist of electrically positive protons and electrically neutral neutrons.…

Q: • oxygen atoms exist longer

A: In this question we have to explain that why oxygen atoms exist longer at 120-Km altitude than at…

Q: What is the difference between mass number and atomic number?

A: Atomic number:The atomic number of the element is the number of protons present in that element.Mass…

Q: How is an atom of the element xenon (Xe) likely to act during a chemical reaction? It will likely be…

A: the correct option is as follows:

Q: Suppose that you face a problem similar to Mendelev: You must predict the properties of an element…

A: In the periodic table, the elements are arranged in order of their increasing atomic numbers. The…

Q: Three isotopes of lithium witch is the most abundant atom?

A: Interpretation-  To tell about three isotopes of lithium which is the most abundant atom .…

Atomic Structure

The basic structure of an atom is defined as the component-level of atomic structure of an atom. Precisely speaking an atom consists of three major subatomic particles which are protons, neutrons, and electrons. Many theories have been stated for explaining the structure of an atom.

Shape of the D Orbital

Shapes of orbitals are an approximate representation of boundaries in space for finding electrons occupied in that respective orbital. D orbitals are known to have a clover leaf shape or dumbbell inside where electrons can be found.