an ion that has 55 protons and 54 electrons is ....

Q: m atom c

A: Atom is the small particle of matter and made up of three fundamental particles which are known as…

Q: What is an element composed of?

A: An element is a pure material made up of atoms with the same number of protons in their atomic…

Q: Some chlorine atoms have an atomic mass of 37, while others have an atomic mass of 35. What is the…

A: The mass number of an atom is the sum of proton and neutrons present in that atom.  Mass number =…

Q: The nucleus, the massive center of an atom, contains which two particles?

A: Nucleus is the massive part of any atoms . It contains mostly all the mass any element. Nucleus was…

Q: 2. Define these terms and explain why these names are used for of elements: a. Family

A: Element  are  the pure substance consisting only of atoms  and  elements cannot  be broken down into…

Q: 5. In a chemical formula, which element is listed first?

A: In a chemical formula, which element has to be listed first has to be given.

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: Differentiate between different isotopes of an element?

A: A number of atoms of some elements have been identified, which have the same atomic number but…

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: Identify the three subatomic particles

A: Atom is the smallest unit of matter. It is an indivisible particle.

Q: Bromine also occurs in nature as two isotopes. What is the specific mass of each isotope? What is…

A:

Q: How do isotopes of a given element differ? How are they similar?

A: In the question, it is asked about the isotopes that what are isotopes and in what manner they are…

Q: If mass # is 141 and the # of protons 58, what is the atomic symbol and the # of neutrons?

A: Given:The mass number  of atom = 141 The no of proton = 58

Q: Describe the general structure of an atom and its isotopes.

A: Atom is the basic unit of matter it consists of a heavy positive mass at its center called the…

Q: How many isotopes of chlorine exist in nature?

A: The element chlorine has two isotopes, chlorine–35 and chlorine–37.

Q: An ion with six protons, seven neutron and a charge of 2 + has an atomic number of?

A: Given :-  Number of protons = 6  Number of netrons = 7  Charge = +2 (which means loss of 2 electrons…

Q: What subatomic particles will be found in the nucleus of an atom ?

A:

Q: How many elements are presently known? About how many occur naturally?

A: Periodic table contains 119 elements but the last elements 119 know as Ununennium or eka-francium is…

Q: Characterize elements and their isotopes.

A: Due to the discovery of various elements, it was very difficult to organize and study the…

Q: Which of the three subatomic particles was discovered first—the proton, neutron, or electron? Which…

A: All matter is composed of atoms and atoms are made up of three subatomic particles- protons,…

Q: An isotope of mercury has 80 protons and 120neutrons. What is the mass number of this isotope?

A: The atom consists of 3 subatomic particles: Protons: They are positively charged particles present…

Q: What is atomicity

A: Atomicity is a term which is used to represent the number of atoms present in any molecule or…

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

A:

Q: How do the three subatomic particles differ?

A: An element is the simplest substance present in a substance and it cannot be further divided into…

Q: The number of neutrons in the nucleus of the isotope 22Na is

A: The number of neutrons

Q: What are isotopes? What is the percent natural abundance of isotopes?

A: Isotopes are stable as well as radioactive in nature.

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: Which is a compound? A. A piece of pure zinc metal B. A molecule made of nitrogen and oxygen C. An…

A: Compound: A molecule consisting of two different elements is called compound

Q: How many electrons are in gold atom? Does protons also take part in chemical reaction?

A: Gold is a chemical element with the symbol Au and atomic number 79, making it one of the higher…

Q: A certain isotope has a charge of +3 and has 33 protons and 42 neutrons in the nucleus. How many…

A: Consider the given information is as follows; Number of protons = 33 Number of neutrons = 42…

Q: What is the Law of Multiple of Proportions?

A: Law of Multiple Proportions ----- When two elements react to form two or more compounds, than the…

Q: In what way are isotopes of a given element always different? In what way(s) are they always the…

A:

Q: A 7.36 g sample of copper is contaminated with an additional 0.51 g of zinc. Suppose an atomic mass…

A: Total weight of the sample = 7.36 + 0.51 = 7.87 g Fraction of Copper in the sample can be calculated…

Q: The existence of isotopes violates one of the original ideas of Dalton’s atomic theory. Which one?

A:

Q: If the mass # is 99 and the # of protons is 43, what is the atomic symbol and and # of neutrons?

A: Elemental symbol gives information about atomic symbol of the element, mass number and atomic number…

Q: For the sodium ion, how many protons, electrons and neutrons are present?

A: Sodium ion - Na+  Sodium(1+) is a monoatomic monocation produced from sodium. It has a role as a…

Q: Which subatomic particles have a negative charge?

A: A typical atom consists of three subatomic particles: protons, neutrons, and electrons. Protons and…

Q: How many isotopes does this element have?

A: From the graph, it is cleared that the number of isotopes of the unknown element is 5.

Q: A student says,A carbon atom is not the smallest possible amount of carbon, because atoms are built…

A: An atom contains electrons, protons and neutrons. Therefore, a carbon atom is composed of its…

Q: Give a Characteristics of an Atomic?

A: Solution-   An atom has three subatomic particles The nucleus has a well-charged atomic center and…

Q: Mercury has an atomic number of 80 and an atomic mass of 200. Mercury has number of protons, number…

A:

Q: How many protons, electrons and neutrons does Cl1?

A: In the question, we have been given a halide ion and we need to calculate the number of electrons,…

Q: In complete sentence, describe the similarities and differences between: Different isotopes of an…

A: In a complete sentence, describe the similarities and differences between different isotopes of an…

Q: Which of the following is true about subatomic particles?

A:

Q: An isotope of chlorine has 20 neutrons. •What is the mass number of the chlorine isotope? •How…

A: Atomic number = Number of protons = number of electrons Mass number = Number of protons + Number of…

Q: what are isotopes

A: The different variants of a particular element, that are differed by the number of neutrons. In…

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.