What is the essential role of atomic number in creating new elements?

Q: What is the approximate mass of an oxygen atom in atomic mass units?

A:

Q: An atom is composed of a central nucleus which is surrounded by which orbiting particles?

A: Atoms have a central nucleus  that is surrounded by one or more electrons (lightweight negatively…

Q: Where in the atom is most of its mass concentrated?

A: The atom comprises of three sub-atomic particles, proton electron and neutron. The protons and…

Q: Element X has 3 isotopes. One of the isotopes has a mass of 59.5 with an abundance of 43.3%. Another…

A: We know that, Average atomic mass of an element is a weighted average of all masses of all isotopes…

Q: If you have a sample of an element, it is made of atoms that all have the same number of which type…

A: To identify : The atoms in a sample of an element have the same number of which type of particlesin…

Q: How many total atoms would be in one formula unit of (NH4)3PO4?

A: N=3 atom H=12 atom P=1 atom O=4 atom

Q: What is the difference between atomic mass and atomic weight? Select one: a. Atomic mass is the…

A: (b) Atomic mass is the mass of an individual atom, whereas atomic weight is the average ( weighted)…

Q: Why don't electrons in the atom enter the nucleus?

A: In electron capture, an atomic electron is absorbed by a proton in the nucleus, turning the proton…

Q: Choose the BEST answer to the following. The neutrons in an atom are normally found (a) inside the…

A: Answer: ai,e  inside the nucleus.

Q: The half-life of an element is 20 years. In how many years will there be 12.5% of the initial…

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Q: What is the most abundant element in the known universe?

A: There are 114 known elements in the universe.

Q: The mass of an atom is measured in atomic mass units. One atomic mass unit is equal to 1.66x10-27…

A: The masses of atoms and subatomic particles are very small.

Q: • The element copper has naturally occurring isotopes of 63 (62.93amu) and 65 (64.93amu). With an…

A:

Q: Name the radiation which can be detected by a solution of silver chloride?

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Q: Fill out the table below. Atomic Mass Number of Number of Name Symbol Charge number Number neutrons…

A: The atomic symbol  is of the form XZA, where X is the symbolic representation of the element, A is…

Q: Choose the BEST answer to the following. When an element ejects an alpha particle, the atomic number…

A: Generally nuclear decay changes the number of protons in the nucleus of an atom and changes the…

Q: Which of the following is not an element: hydrogen, carbon, oxygen, water?

A: An element is a pure substance which means it consists of only one type of atoms. When the atoms of…

Q: Fill in the blanks with the missing items. Refer to the periodic table of elements The first one…

A: We use the properties: Atomic number = no of electrons Atomic mass = no. of protons + no. of…

Q: Draw a model to represent the nucleus of Oxygen 8. 15.999 Oxygen Mass Number 16 %3D

A: Oxygen has an atomic number of 8 and atomic mass of 16. It consists of 8 electrons and 8 protons and…

Q: What results from an unequal sharing of electrons between atoms?

A: Electrons are carriers of charges.

Q: . One isotope of oxygen has the atomic number 8 and the mass number 18. An atom of this isotope…

A: We know Isotopes have same atomic number (protons number ) but deferent mass number given oxygen has…

Q: What element results if you add a pair of protons gto the nucleus of mercury?

A: Number of protons n in an element of mercury is 80

Q: For an electrically neutral atom, the number of protons in the nucleus of is equal to the number of…

A: The proton are positively charged and electrons are negatively charge with the equal in magnitude of…

Q: You could swallow a capsule of germanium without ill effects. But, if a proton were added to each of…

A: One can swallow a capsule of germanium without ill effects. Because it contains 32 protons…

Q: This subatomic particle is what gves the nucleus an overall positive charge. This is the space…

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Q: What will happen when an electron returns to its original energy level?

A:

Q: How many types of atoms can you expect to find in a pure sample of any element?

A: Step 1To find the number of atoms in a given sample, we need to find the number of moles of the…

Q: How many atoms of carbon-14 are there in Ig of carbon-12 in living organism?

A: Since there are 6.022×1023 carbon atoms in 12 grams of carbon. The 12 gram carbon atom contains,…

Q: What kind of basic force pulls electrons close to the atomic nucleus?

A: The positive charge of nucleus pulls the electrons close to the atomic nucleus. The nucleus of an…

Q: What fundamental force binds the nucleus of an atom together?

A: There is a total of four fundamental forces present in the universe and out of which the strong…

Q: What are the five most common elements in living things?

A: Living things are composed of several elements, but there are certain elements which form the basic…

Q: half-life of an element is 20 years. In how many years will there be 12.5% of the initial material…

A: Given T1/2 = 20 years

Q: How can a charged atom (an ion) attract a neutral atom?

A: Given: A charged atom and a neutral atom

Q: Discuss why equal masses of carbon atoms and oxygen atoms don't contain the same number of…

A: When a loaf of bread is squeezed its volume will decrease and as there is no loss of the mass the…

Q: While researching for her class presentation, karen has read that natural occuring Gallium consists…

A: Given in question -  60% Ga (atomic mass=68.911)                                    40 % of…

Q: Choose the best answer to the following: The nucleus of an electrically neutral iron atom contains…

A: The atomic representation of iron is

Q: Choose the best answer to the following: If two protons and two neutrons are removed from the…

A: Step 1Proton and neutron are respectively represented as

Q: Just after an alpha particle leaves the nucleus, would you expect it to speed up? Defend your…

A: An alpha particle is emitted by a nucleus

Q: Which of these elements has an electron structure MOST similar to that of element X? a.) 3 b.)2…

A: Element X

Q: The electrical interaction between the nucleus and the electron is a force of

A: Attraction

The Bohr model

Students often get confused between Rutherford’s model and Bohr model of an atom. They interpret the postulates of both these models to be the same, which is incorrect. Rutherford’s model differs from Bohr’s model in the following ways: