Approximately how many elements are listed in the periodic table? How many can be found in nature? What is the reason for the difference?

Q: In 1808, John Dalton proposed a series of statements regarding the atom that became known as…

A: Given, Five statements of Dalton's atomic theory is given -     Required,                   Among…

Q: What class of elements lies along the “staircase” line in the periodic table? How do the properties…

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Q: 27. Upon decomposition, one sample of magnesium fluoride produced 1.65 kg of magnesium and 2.57 kg…

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Q: A sample of element X has two naturally occurring isotopes. The isotope X-45 makes up 35.8% of the…

A: Isotopes are species having same atomic number but different mass number.  Given: The percentage of…

Q: Naturally occurring chlorine (Cl) consists of two isotopes. One of the isotopes has a mass of 34.969…

A: Isotopes have same atomic number but different atomic mass or mass number. Atomic number is equal to…

Q: What are the 50 elements and their symbols?

A: An atom is the basic and fundamental unit of matter. An atom consists of electron and the nucleus in…

Q: A radioactive isotope of chromium, Cr-51, can be used to label red blood cells in your body. Which…

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Q: How are the concepts of an atom and an element related? What causes elements to differ?

A: A particular atom will have the same number of protons and electrons and most atoms have at least as…

Q: Distinguish among the types, locations, and charges of subatomic particles.

A: Protons, neutrons are electrons  that are the three fundamental subatomic particles present in the…

Q: Describe the process of determining the number of Subatomic particles in Atoms?

A: An atom is the smallest invisible and indivisible particle of matter. However, an atom still…

Q: Explain the difference between an ion and an isotope. Include the specific names for the two types…

A: * ion : Ion is any atom or group of atoms that bears one or more positive or negative electrical…

Q: Distinguish between an element and an atom. NO PLAGIRISM

A: Atom is smallest repeating unit that can not be furAtoms are  composed of subatomic particles called…

Q: 32. Americium­241 is used in household smoke detectors. This element has 11 known isotopes, none of…

A: Given  Atom = Americium - 241  Number of proton , neutron , electron = ?

Q: How does Chemistry provide a background for understanding the properties of matter in terms of…

A: To explain the structure of atoms, avrious philosphers and scisnitists proposed a number of theories…

Q: All the chemical elements may be derived from which single element?

A: All the chemical elements may be derived from one single element. That has to be given below.

Q: An unknown element has two naturally occurring isotopes. Isotope 1 has a mass of 119.0 amu and an…

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

Q: can you take a look at two elements located into different corners of the Periodic Table - Lithium…

A: An atom is composed of three main sub-atomic particles; electrons, neutrons and protons. The atomic…

Q: Back on planet Earth, elements have different isotopic distributions. The atom Chlorine ( Cl ) has…

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Q: An unknown element is determined to have two naturally occurring isotopes. Isotope 1 is 62.11%…

A: Atomic mass of element can be determined by adding the product of %abundant and mass of isotopes.…

Q: What is the name of the element that is in group 3A and period 2? fill in the blank 1What is the…

A: The objective of the question is to identify the elements that are located in specific groups and…

Q: Suppose we have three hypothetical atomic nuclei: A, B, and C. Nucleus A has 3 protons and 4…

A: According to the question, we have three hypothetical atomic nuclei:A, B, and C. Nucleus A has 3…

Q: Why is it important to study atomic theory?

A: Matter is composed of small particles . Atomic theory tells about the particles and refereed them as…

Q: An element has three isotopes with the following masses and percent natural abundances. Determine…

A: Given that,

Q: Which of these is found in the nucleus of an atom? * -Protons -Electrons -DNA -Depends on the atom

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Q: Which elements make up about 99% of the mass of living things?

A: Elements are very important for the maintenance of biological life. For example sodium and potassium…

Q: Where on the periodic table are the most nonmetallic elements found?

A: Elements that gains electrons and form their respective anion are known as non-metals.   Seventeen…

Q: For an unknown isotope ion, fill in the missing information below. Isotope symbol: U (For the…

A: Given that, Atomic no. = 90 Isotope symbol= U So,

Q: potassium and sulfur Express your answers as ions and chemical formula separated by a commas.…

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Q: The Atomic Number is the number of protons an element has, if that element has no charge, it will…

A: An atom basically consists of proton, neutrons and electrons. The protons and neutrons are present…

Q: The most abundant isotope of Hydrogen has a mass of 1 amu.  Therefore, the average atomic mass on…

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Q: Potassium has an atomic number of 19 and an atomic mass of 39 (ignore the possibility of isotopes…

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Q: Naturally occurring iodine is iodine-127.  Medically, radioactive isotopes of iodine-125 and…

A: If   XZA is the chemical element for an isotope thenA is the mass number A = number of protons +…

Q: Which statement is NOT a part of Dalton's atomic theory? The atoms of each element are unique.…

A: we know dalton's atomic theory According to dalton's theory, all matter, the element or compound and…

Q: An element has two naturally occurring isotopes. One has an abundance of 58.009% and an isotopic…

A: Isotopes of any element is the Pair of element with same atomic number but different mass number.

Q: Silicon is important to the semiconductor manufacturing industry. The three naturally occuring…

A: Silicon belongs to group 14. It is present in abundance, low band gap and easy fabrication makes it…

Q: Calculate the atomic mass for iron given the data for its natural isotopes. Fe-54: 53.940 amu 5.82%…

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Q: 2. An unused flashbulb contains magnesium and oxygen. After use, the contents are changed to…

A: Given that,  A flashbulb contains magnesium (Mg) and oxygen (O2) , they react and forms magnesium…

Q: Complete the table below, using the diagram of an atom shown at right. name symbol 8 0 proton Bo n 0…

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Q: chlorine has two different isotopes. one isotope has a mass of 35.00 amu and another has a mass of…

A: Average atomic mass of Chlorine depends on the relative abundance of the isotope present in the…

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.