Which element accounts for roughly 75% of the observed mass of the universe? Which four elements make up 95% of the mass of the human body?

Q: What is the mass of 4.91×10214.91×1021 platinum atoms?

A: For  calculating the mass of substance , we have the governing equation  m=NA×Molecular weight ,…

Q: Fill in the gaps in the following table, assuming each column represents a neutral atom: Symbol 52Cr…

A: Fill in blanks with suitable number-

Q: Which of the following statements is incorrect? A. Protons are positively charged. B.) Protons…

A: Atom is made up of 3 particles 1) Proton 2) Neutron  3) electron

Q: Complete the following table for two of the naturally occurring isotopes of potassium, which is an…

A: Please find the attached images for answer

Q: An element 'A' contains 4 protons, 4 electrons and 5 neutrons. it is + 1. It becomes when it has 4…

A: For a neutral atom, the number of electrons or protons is equal to its atomic number. The mass…

Q: The isotopes of the same element have.... Equal numbers of neutrons The same mass numbers The same…

A: isotopes of the same element has same atomic number but different mass number. Mass number = Number…

Q: A carbon atom has a mass number of 12 and an atomic number of 6. How many neutrons does it have?

A: The atomic no. of the atom can be described as the total no. of protons that are present in the…

Q: A common isotope of Li has a mass number of 7. The atomic number of Li is 3. How can this…

A: The lithium atom has atomic number three, and the number of protons in the nucleus of lithium is…

Q: 3 major subatomic particles that make up an atom

A: Earlier it was believed that an atom is the smallest particle that is the building block of…

Q: List the three subatomic particles that compose atoms and give the basic properties?

A:

Q: The element magnesium has three naturally isotopes. Given the following information, calculate the…

A: The data given is,

Q: Which statement about subatomic particles are true? Protons have twice the mass of neutrons

A: Subatomic atomic particles: A standard atom consists of three subatomic particles:  Electron Proton…

Q: What is the single exception to the statement that all atoms comprise protons,neutrons, and…

A: The protons, neutrons, and electrons are the salient features of an atom. The protons present in the…

Q: For each atom give the following information: [1] the atomic number; [2] the mass number; [3] the…

A: The given compounds are 11850Sn 195Pt To find: atomic number, mass number, number of protons, number…

Q: • Complete the following table: Atomic lon Number of Number of Number of Mass Protons Electrons…

A: NOTE : Since you've posted a question with multiple sub-parts,we'll solve first three sub-parts for…

Q: Give a second property of neutrons that is similar to the properties of protons.

A: Firstly, both protons and neutrons have same mass, i.e. 1 amu.   1 atomic mass unit (amu) equals…

Q: Which statement about subatomic particles are true? Electrons are much lighter than neutrons.

A: Subatomic particles include electrons, the negatively charged, almost massless particles that…

Q: For each atom give the following information: [1] the atomic number; [2] the mass number; [3] the…

A: General representation of an element : zXA   Atomic number = Z Mass number = A Symbol of element = X…

Q: The average atomic mass of lithium is 6.941 amu. Lithium has two naturally occurring isotopes, 6Li…

A: Given:The average atomic mass of lithium = 6.941 amu% of Li isotopes = 6Li (7.52%) and 7Li…

Q: One isotope has a mass of 62.9296 amu (69.17% abundance). The other isotope has a mass of 64.9278…

A:

Q: Consider a sample of antimony collected from a different solar system. The sample contained 45.8…

A:

Q: Copper exist in 2 naturally occuring isotopes the average atomic weight of copper is 63.546 amu if…

A:

Q: Which statement about subatomic particles are false? Protons have about the same mass as neutrons.

A: An atom is made up of subatomic particles which are protons, neutrons and electrons.

Q: What are the basic components of an atom?

A: Atom can be described as the building block of the chemistry where it is the smallest indivisible…

Q: An Se atom has a mass number of 78. How many neutrons does it have?

A:

Q: Define one atomic mass unit (amu).

A:

Q: How many electrons does it take to equal the mass of a proton?

A: An atom is made up of three subatomic particles. These are known as protons and neutrons that are…

Q: List the three main subatomic particles?

A: Stable particles which Play important role formation of atoms of matters called as main subatomic…

Q: Which of the following are isotopes? Atom or ion A QR MGEL # of electrons 5 9 18 28 36 5 9 # of…

A: Isotopes are the species that has same number of protons but different number of neutrons.

Q: Which of the following element has the isotope with 21 neutrons and mass number of 40?(1) Argon(2)…

A: Number of protons can be determined by subtracting number of neutrons from the mass number of an…

Q: An ion of platinum has a mass number of 195 and contains 74 electrons. How many protons and neutrons…

A: Given data: The mass number of platinum ion=195 Number of electrons present in platinum ion=74 To…

Q: Boron (B) has two naturally occurring isotopes: boron-10 (abundance = 19.8%, mass = 10.013 amu) and…

A: An atom consists of protons along with the neutrons which occupy the nucleus and the electrons which…

Q: Complete the following table: Symbol #of Protons #of Electrons # of Neutrons "He 20N 2 27A

A: 1) The ion given is 4He+. Since the atomic number of He is 2. Hence number of protons = atomic…

Q: The average atomic weight of copper, which has two naturally occurring isotopes, is 63.5. One of the…

A: Given, The average atomic weight of copper  is 63.5. One of the isotopes has an atomic weight of…

Q: Name and describe the components of an atom

A: Atom is the basic unit of matter All the matter in this universe is made of atoms.

Q: Which statement about subatomic particles are false? Some atoms don’t have any protons.

A: All atoms have protons.  Every atom has fixed number of number of protons.

Q: Which isotope has the same number of electrons and neutrons as the anion 19F- 180 19NE 1802- 23 Na…

A: The number of electrons in 19F- is 10  The number of neutrons in 19F- is 10

Q: Complete the following table. Element Symbol Nuclear Symbol Protons Neutrons Electrons 46 35 Br 79…

A:

Q: A certain element consists of two stable isotopes. The first has a mass of 138 amu and a percent…

A: Given  Atomic mass of first isotope ( M1 )       = 138 amu  percentage natural abundance ( P1)     =…

Q: What are the main components of an atom ?

A: The main components of an atoms has to be given.

Q: A certain element consists of two stable isotopes. The first has a mass of 113 amu and a percent…

A: To find out the mass of the element, multiply both mass of isotopes and their natural abundance. You…

Q: What is the atomic mass of Cadmium ? A) 12.011 amu B) 40.078 amu C) 132.91 amu  D) 112.42 amu

A: Given atom,        Cadmium (Cd)

Q: How many neutrons are there in this element?

A: Given : We have to tell number of neutrons in the given element.

Q: what element has 17 protons and 18 neutrons

A: Proton of an element is equal to the  atomic number of element. sum of proton and neutron is equal…

Q: Fill in the blanks. Isotope 25Mg2+ has: Number of protons Number of neutrons Number of electrons…

A: Given  Symbol of isotope    = Mg2+24 Number of proton    = ?  Number of neutron  = ?  Number of…

Q: What is the mass number of an atom which is made up of 38 protons, 52 neutrons and 38 electrons.

A: Mass number = Number of protons + Number of neutrons

Q: Atoms of different elements can have the same mass numbers.   True   False

A: an element have same mass numbers but have different atomic numbers is known as isobars.

Q: Given that the atomic mass of aluminum is 26.98 grams, which of the following isotopes would you…

A: We have to predict the most abundant isotope.

Group 14 Elements

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