Which pair of elements has the most similar properties? (a) Sr and Ba                (b) S and Ar(c) H and He                 (d) K and Se

Q: Which of the following is described as a pure substance that consists only of atoms with the same…

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Q: The first atoms of seaborgium (Sg) were identified in 1974.The longest-lived isotope of Sg has a…

A: (a) we are asked to give the of protons electrons and neutrons in the given atom 266Sg  The number…

Q: In which set of elements would all members be expected to have very similar chemical properties?

A: Cu, Ag, Au is the correct option.  Elements belonging to the same group of similar chemical…

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: 4. What are the main ideas in the nuclear theory of the atom?

A: The main ideas of nuclear theory of an atom has to be given. The atomic model of Rutherford is also…

Q: In the following diagram, blue spheres represent the element A and yellow represent the element

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Q: Which arrangement of elements did Mendeleev find produced a repeating pattern of properties?

A: According to Mendeleev Periodic law, the periodic properties of the elements are repeated after…

Q: Aluminum has 13 electrons, 13 protons and 14 neutrons a) What is its atomic mass? b) What is its…

A: The atomic number of aluminium is = 13 The number of protons in the aluminium is = 13 The number of…

Q: You are an element capable of producing oxygen when fused with you own kind, which element are you

A: Oxygen is a diatomic gas.

Q: 7. Is matter usually charge-neutral? How would matter be different if it were not charge-neutral?

A: Matter is neutral since they have equal number of protons(positively charged) and electrons…

Q: 23U → 23Th + He 2. For each element, what do the top (superscripted) and the bottom (subscripted)…

A: Introduction: In the above reaction nucleus of uranium undergoes alpha decay ,in this nuclear change…

Q: 4. If you were given an antique piece of jewelry and you were told that it was made of solid gold,…

A: There are several tests that are used to detect the purity of gold used by jewelry manufacturers…

Q: Which group(s) in the periodic table contain only nonmetals?

A: The group in the periodic table contain only nonmetals has to be given,

Q: pretend that an atom has 25 protons, 20 electrons, and 30 neutrons. What is that charge?

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Q: For each of the elements Na, Ni, Al, P, Cl, and Ar, providethe following information:a. Which are…

A: In the periodic table, elements are arranged as a function of their atomic number. There is a…

Q: Which two of these elements would you expect to show the greatest similarity in chemical and…

A: The elements which are expected to show the greatest similarity in chemical and physical properties…

Q: The element (X) is located in the third period and the group (5A) and the element (Y) is located in…

A: The atomic number of the element located between them is 33 & the name of the element is…

Q: A. What is the mass number of an atom of Iron ( atomic number 26) with 32 neutrons?  B. Is this…

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Q: Define the term an element?

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Q: What are the "A" group numbers for Aluminum, Calcium, and Cesium, respectively?

A: In chemistry, a group refers to a column of elements in periodic table. In total there are 18 groups…

Q: Which elements are most likely to have properties that are similar to the properties of F?

A: Br and Cl have the similar properties like Fluorine. Because F is the member of 17 group in the…

Q: If a neutral atom of an element has 19 electrons and 14 neutrons, its atomic mass is??

A: Given  Number of electron = 19 Number of neutron = 14  atomic mass = ?

Q: is chlorine gas an element ?

A: The simplest chemical substance which made up of atoms with the same number of protons and it cannot…

Q: the history of the discovery of hydrogen and what properties they observed to identify it

A: Position of hydrogen in periodic table:   Hydrogen is regarded as rogue / disputable element because…

Q: Electron- Proton- Atomic number- Atomic mass- Neutron- Nucleus- C. Isotopes or Different Elements?

A: A typical atom is made up of subatomic particles that include electrons, protons, and neutrons.…

Q: A fictitious element X has a molecular weight of 9.46 g/mol. If the volume occupied by one atom of…

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Q: Recognize the important subdivisionsof the periodic table: periods, groups(families), metals, and…

A: Recognize the important subdivisions of the periodic table: periods, groups (families), metals, and…

Q: Write the name of element and classify it as a metal, nonmetal, or metalloid. I

A: Metals are opaque, lustrous elements that are good conductors of heat and electricity. Most metals…

Q: Of the elements Be, C, Cl, Sb, and Cs, which is most likely to be a metalloid?

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Q: What is a family or group of elements?

A: Elements: These are the basic pure substances from which chemical compounds can be formed. To define…

Q: .What is the difference between the number of electrons in an atom of selenium, Se, and the number…

A: The number of electrons of an atom is equal to the atomic number of that atom. These are the…

Q: for elements (Br, Ca, Fe, Na, S, Si, and Xe) which of the following term(s) apply? a. metal b.…

A: To classify the elements we have see in which block of the periodic table  the given element 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: An unknown particle is caused to move between two electricallycharged plates, as illustrated in…

A: a) The unknown particle present between the two electrically charged particles is hypothesized to be…

Q: Does uncertainity principle is applicable to all subatomic particles?

A: For the subatomic particles, their exact position and the exact velocity cannot be determined at the…

Q: the element manganese (Mm

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Q: element 'X' is

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Q: Which of the following elements would you expect to have similar properties? As Te Ar Sn He

A: The element present in the same group of the periodic table has the same chemical properties. The…

Q: In the periodic table, calcium, element 20, is surrounded by elements 12 magnesium , 19 potassium,…

A: The most resemple element of calcium atom is magnesium and Strontium.

Q: represent the same element?

A: we know,In atom the number of protons and electrons are equal but different neutrons is possible.so…

Q: Does the force of attration increase, decrease, or stay the same as two oppositely charged particles…

A: When two charges move towards each other it means that they are oppositely charged and the force of…

Q: When elements are arranged by increasing atomic number, and by periods according to their…

A: According to the given question we have, as we move across the period the atomic number increases.…

Q: Give the names and chemical symbols for the three isotopes of hydrogen.

A: The name and chemical symbols for the three isotopes of hydrogen has to be given,

Q: Do isotopes have the same chemistry among each other? Do they have the same electron configuration?

A: Isotopes of an element have same number of protons with different number of neutrons in the nucleus.…

Q: Since different isotopes of the same element have the same chemical behavior, how can they be…

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Q: What is the relationship between an isotope’s abundance in nature and an element’s atomic mass…

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

Q: Which statements are true? A. There are 11 elements represented in the periodic table by letters…

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Q: What is a diatomic element

A: An element is defined as a substance which contains only one type of atom. For example, a piece of…

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.