Which of the following is the least massive?  a. A neutron b. A proton c. An alpha particle d. An electron e. All of these have more or less the same mass 1 answer only

Q: Abeta particle has a mass number of ____ and a charge of _____.

A: Given A beta particle has a mass number of ____ and a charge of _____.

Q: g. What is the atomic number for potassium? h. What is the atomic mass for potassium? i. How is the…

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Q: Selenium-80 is a naturally occurring isotope used in overthe-counter supplements.a. How many protons…

A: An atom is mainly composed of three sub-particles; electrons, protons and neutrons. These particles…

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Q: 35. Who discovered the neutron? J. J. Thompson Ernest Rutherford James Chadwick Marie Curie A B C

A: The essential nature of the atomic nucleus was established with the discovery of the neutron by…

Q: Chemistry: Fundamentals and Principles Davidson presented by Macmillan Learning For each set of…

A: For a neutral atom, Atomic number = Number of protons = Number of electrons and Mass number = Number…

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Q: What pattern do you notice? What's similar about most of the radioactive elements?

A: There is an obvious pattern to look for: Atomic number increases as you move right along a row.…

Q: - Part C What is the symbol for the isotope of 55 Fe that possesses 31 neutrons? Express your answer…

A: Isotopes are defined as same element having same number of proton but different number of neutron in…

Q: The isotope with 15 protons and 14 neutrons is? The isotope with 9 protons and 8 neutrons is? The…

A: As we know, Mass number of an atom = number of protons +the number of neutrons Atomic Number of an…

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: Rutherford bombarded a gold foil with alpha particles. Describe what he observed and what did his…

A: Rutherford bombarded a gold foil with alpha particles which are positively charged particles and…

Q: In dating geological samples, scientist compare the ration rubidium-87 to strontium-87. Give the…

A: The atomic number is the number of protons in the nucleus of an atom. In an electrically neutral…

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A: Given, Mass of three atoms are provided     Required,                          Number of protons ,…

Q: "the atom with 38 protons and 49 neutrons"

A: Given,        Number of protons = 38         Number of neutrons = 49  Assume an atom is 'X'

Q: Antimony (Sb), has two naturally occurring isotopes: Sb-121 that has a percent abundance of 57.30 %…

A: Given: Antimony (Sb) has two isotopes Sb-121 and Sb-123 Mass of Sb-121 =120.90 amu Percentage…

Q: Chemistry midterm A neutron has a mass of and a charge of

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Q: 24.1% of all isotopes of an element have a mass of 75.23 amu. 48.7% have a mass of 74.61 amu and…

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Q: Fill in the missing mass number and atomic number for each of these particles or types of radiation.…

A: The Radioactive atoms emit radiation of different frequencies.  The radiation are emitted by the…

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A: Neutral atom are those having not any charge. They are wholely neutral

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Q: Describe Rutherford’s nuclear theory?

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Q: i have 16 protons  16 neutrons and 18 electons  what would a sketch look like?

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Q: Hi, I am doing a practice test and need to check my answers. All of this is for Chem 101   Please…

A: Answer of given questions are as follows:

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Q: what is atomic mass? how is it computed

A: what is atomic mass? how is it computed?

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Q: 3. Atomic #= # of and # of Atomic Mass= #.of neutronsD

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Q: If you wanted to change the mass number in the simulation, changing the number of which particle or…

A: Mass Number is considered to be the Atomic Mass of an element.

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Q: In Rutherford’s gold foil experiment, which particle(s) were used? Group of answer choices α-rays…

A: Alpha rays (radiation) is the emission of an alpha particle (helium nuclei). Beta rays (radiation)…

Q: 14 Which types of subatomic particles are found inside the nucleus of an atom?

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Q: Part B The atomic number of carbon is 6. What is the mass number of a carbon atom with 5 neutrons?…

A: Given that, Atomic number of C=6 No. of neutron=5 so,

Group 14 Elements

The following elements come under group 14 of the periodic table.