The complete symbol of an atom with atomic number 20, mass number 42 is?

Q: Define the term atomic nucleus?

A: Atoms are the building blocks of any matter. The composition of the atomic nucleus gives information…

Q: What is a quark?

A:

Q: Why are some atoms radioactive?

A: The radioactive nuclei are unstable and have an excess number of either protons or neutrons in the…

Q: Given the only naturally occurring isotope of phosphorus is P-31, determine its mass from the…

A: The mass of phosphorus-31 from the periodic table.

Q: Given the only naturally occurring isotope of aluminum is Al-27, determine its mass from the…

A: Isotopes of an element are the ones which have the same atomic number but different mass number.…

Q: Atoms of the same element that have different atomic masses are called isotopes

A: An isotope is a variation of an element that possesses the same atomic number but a different mass…

Q: What is the symbol for an atom of Cd that has 13 extra neutrons and what is that called ?

A: Cd is present alongwith Zn and Hg i.e. it is kept in d-block although it is not a typical d-block…

Q: Name the sub – atomic particles of an atom.

A:

Q: Calculate the atomic mass for an element given the mass and abundance of the naturally occurring…

A: Atomic mass: It is equal to sum of all proton and neutron. It is the mass of compound present in one…

Q: Consider the atom with the chemical symbol Ru. What would be the mass number for an atom of Ru which…

A: Mass number is  the sum of the numbers of protons and neutrons present in the nucleus of an atom..…

Q: An atom has an atomic number of 12 and a mass number of 26. Another isotope of this atom could have

A:

Q: Use the notation to represent the isotope of silver having a neutron number of 62.

A: Isotopes are the compounds with same atomic number but different mass number. They have same number…

Q: What does the number 84 represent in the name krypton -84?

A: Since we know that  a element having same atomic number but different mass number are known as…

Q: Which particle, if lost from the nucleus, will not result in a change in the atomic mass number?

A: Which particle, if lost from the nucleus, will not result in a change in the atomic mass number?

Q: Given the only naturally occurring isotope of fluorine is F-19, determine its mass from the periodic…

A: Isotopes are the ones which have the same atomic number but different mass number. Atomic number is…

Q: What is the charge of the nucleus of element 89?

A: The number of protons corresponds to the charge of the nucleus since Neutrons have no net charge, it…

Q: The complete symbol of an atom with atomic number 20, mass number 42 is? Select one: до Са20 а. 42…

A: Atomic number 20 means the element have 20 proton and mass number 42 means total proton ans neutron…

Q: atomic number 119 and mass number of 252  where would this element be placed? What period would it…

A: Ununennium   Ununennium, also known as eka-francium or element 119, is the hypothetical…

Q: What is a stable isotope of lithium? How many electrons does it have?

A:

Q: Write a isotope symbol for An atom with 66 neutrons and a mass number of 116

A: Isotopes are the species that differ to each other in number of neutrons they possess, but have same…

Q: What is the mass of an assembly of 1000 electrons?

A:

Q: How many electrons would it take to equal the mass of a helium nucleus?

A: The helium atom has 2 protons, 2 neutrons and 2 electrons. The mass of helium nucleus depends only…

Q: Beta particles are best described as _ ejected at high speeds from a radioactive nucleus. positive…

A: Radioactive decay is the emission of radiation from the unstable nucleus is called radioactivity .…

Q: Why is the number of electrons not part of the mass number of an atom?

A: The reason for the number of electrons not part of the mass number of an atom  has to be given.

Q: What is the mass of the isotope is arsenic-73

A: The correct answer is given below

Q: The nucleus of an atom is composed of

A: Entire mass of an atom is situated at the centre that is in the nucleus.  Number of electrons =…

Q: From greatest to least, rank them by the number of nucleons in the nucleus. Consider the atoms (a)…

A: In chemistry, the term nucleon can be defined as the subatomic particle which is found in the…

Q: For the 19O2- Isotope identify the number of Protons,  Neutrons,  Electrons

A: For a general element, XZA Z- atomic number = number of protons A- mass number = number of protons +…

Q: Of the particles below which one, if lost from the nucleus, changes the atomic mass the greatest? O…

A: The particles are defined as follows --- Proton: The symbolic expression of proton is H11 which has…

Q: The major portion of an atom’s mass consists of:a. neutrons and protons.b. electrons and protons.c.…

A: Mass proton = 1.67 x 10-27 kg Mass of neutron = 1.67 x 10-23 kg Mass of electron = 9.1 x 10-31 kg

Q: what are the Similarities of atomic mass and atomic numbers?

A: Atomic mass is associated with the number of neutrons and protons that are present in a particular…

Q: What is difference between Atomic mass & Mass nиmber

A: Atomic mass and Mass number

Q: [d] Do the same with these five words: beta, neutron, uncertainty, decay, electron.

A: [c] Write a single sentence, using all of these five words plus other words, that makes scientific…

Q: Which particle, if lost from the nucleus, changes the atomic mass the greatest?   a. proton   b.…

A: b. alpha particle

Q: Identify for an atom of 9Be: element name: _____________ Z, atomic number = ____         A, mass…

A: Give the answer for 9Be atom= ?

Q: Complete the following table. Isotopic Atomic Number Mass Number # protons # neutrons # electrons…

A: To calculate the numbers of subatomic particles in an atom, use its atomic number and mass number:…

Q: How is the mass number related to the protons and neutrons?

A: The nucleus of the atom of an element is composed of protons and neutrons. The sum of the number of…

Q: What are the number of protons, neutrons, and electrons in the following isotopes?

A: Atomic number of an element is equal to the number of protons present in it which is written as…

Q: Identify for an atom of 96Mo: element name: _____________ Z, atomic number = ____ A, mass number =…

A:

Q: Which particle, if lost from the nucleus, will not change the element (no change to atomic number?)

A: Atomic number of parent nuclei changes when we add or remove charged particles like α-particle…

Q: Isotopes are elements of the same type with different numbers of resulting in differing .

A: number of protons = atonic number  number of electrons = atomic number (for a neutral atom)  number…

Q: Sulfur has four naturally occurring stable isotopes. The onewith the lowest mass number is…

A: Introduction: As we know, Atomic mass =∑isotope mass +% Isotope abundance100 We know there are four…

Q: Distinguish between the atomic numberand the mass number of an atom.

A: in any atom atomic number is defined by number of proton in it . And mass number is defined as sum…

Q: atoms which has the largest mass?

A: Till now periodic table contains 118 elements

Q: mass number of 319 possesses _____________ nucleons.

A: Number of Neutrons(N) = 137 Mass number(A) = 319 So, Number of protons(P) = A - N  = 319 - 137 = 182

Q: Write the symbolic notation of an isotope of an element having 8 protons, 8 electrons, and 9…

A:

Q: For the isotope 815e2- _protons neutrons electrons there are is the mass number is the atomic…

A:

Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.