2 Give the name of each of the following elements: a. Noble gas in Period 2 b. Halogen in Period 2, c. Alkali metal in Period 3 d. Halogen in Period 3 e. Alkali metal in Period 4.

Q: You are given the following information about an element: atomic number = 17, atomic mass= 35.45,…

A: Atomic number of any atom refers to the number or count of protons present in the nucleus of that…

Q: Write the atomic symbol for each of the following a. an atom with 47 protons and mass number of 107…

A: The atomic symbol for each of the following are,The representation of any atom is given by its…

Q: MCQ 30: The number of clectrons (e) are always equal to number of protons(p*) in a A. neutral atom…

A: In this question, we have to find out the correct answer of given problem by the help of the…

Q: Which elements are nonmetals? (excluding semi-metals or metalloids) 01. Hydrogen O 2. Helium O3.…

A: Non metals which not behave like a metal. They are poor electrical and thermal conductors.

Q: None

A: Explanation: We are tasked to draw Mg-25, showing the subatomic particles, their charges, location,…

Q: expanded structural formula of methane

A:

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

A: Isotopes are defined as atoms having same atomic number but different mass number due to different…

Q: As we saw in the previous problem, lithium has two naturally occurring isotopes: Li-6 (natural…

A: The mass which is closest to the atomic mass of Li has to be given.

Q: Must the numbers of protons, electrons and neutrons be the same or different in each of the…

A:

Q: choose the correct answer.   36. Which of these represents an ion? *

A: Atomic number of an element is equal to number of protons present in nucleus of atom of that…

Q: Which element is the only transition metal that has a single-letter chemical symbol that is not the…

A: Co-ordination compounds are formed when the metal ion is bonded to the ligand which donates its…

Q: 1. Give the name and element symbol of the element described by the following a. A noble gas in…

A:

Q: Which of the following statements about a calcium ion are correct? (1)  It has the same number of…

A: A question based on the structure of atoms that is to be accomplished.

Q: 10. What is the mass number of a helium atom that has two protons and two neutrons?

A:

Q: 96. Plutonium-239 is used in nuclear bombs. Determine the number of protons and neutrons in…

A: The atomic number of an element represent the number of protons present in the nucleus of that atom.…

Q: Calculate the atomic mass element "X" if it has 2 naturally occuring isotopes withthe following…

A: Percent abundance of X-51 = 67.88 %  Percent abundance of X-53 = 32.12 %

Q: 1. Write the three characteristics of metals and nonmetals. Metals Nonmetals 2. List the subatomic…

A: In this question, we have to find out the correct answer of given problem by the help of the…

Q: How many protons and electrons are there in a neutral atom of each of the following elements?a.…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: How many of each subatomic particle does an atom of lead-208 have?

A: Subatomic particles are also known as elementary particles. The main three subatomic particles are…

Q: MCQ 4: The atomic number is the number of A. protons (p) B. electrons (e) C. neutrons (n") D.…

A: In an atom, a nucleus contains protons and neutrons in which former is positively charged and latter…

Q: 8. Use isotope notation to show a. chromium-54 b. strontium-84 9. Use the internet to find the…

A: Answer is given in below image

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

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: 24. Is the following statement true or false? The periodic law states that when elements are…

A: We have been given a statement regarding periodic law. We have been asked that whether the given…

Q: Complete the following table for an isotopically labeled atom or ic

A: We are Given incomplete table.We have to Complete the given table Number of protons (p) = Atomic…

Q: B. Use the information provided for each isotope to complete the chart. Atomic Symbol 35C1 88Cr…

A: Note : Dear student since you have posted multiple questions, we will solve only first question for…

Q: Aluminum has an atomic number of 13 and an atomic mass of 27. Aluminum (with NO charge) has a. 14…

A: Protons: Protons are positively charged subatomic particles found in the nucleus of an atom. The…

Q: Part III. Calculate the percent of each isotope using the atomic mass found on your periodic table.…

A: The elements are arranged in the rows and column of the periodic table. Moreover, certain elements…

Q: Which of the following elements forms a cation? a. carbon O b. phosphorous O c. krypton O d. nickel…

A: The objective of the question is to find the elements from the given options that can form a…

Q: From the results of his gold foil experiment, Rutherford concluded that   Group of answer choices A.…

A: From the results of his gold foil experiment, Rutherford concluded that atoms are composed of a…

Q: postulate in the atomic theory did the discovery of isotopes contradict

A: The postulates of atomic theory are shown below: Matter is made up of small indivisible particle is…

Q: 5. Which elements are halogen elements? A. Fluorine, Chlorine, Bromine B. Calcium, Strontium, Barium…

A: We would use periodic table properties to answer these questions.    Note : As you have uploaded…

Q: the following table (each column represents a different isotope): b. Complete Chemical Symbol…

A: Given an incomplete table of different isotopes. Complete the table.

Q: 1. Describe the periodic table, 2. 3. Where are the alkali metals and the halogens located on the…

A: #1: A periodic table is a tabular arrangement of elements in form of rows and columns in increasing…

Q: 3. Use the periodic table to find the atomic mass, atomic number, number of protons, and number of…

A:

Q: In complete sentences, describe the similarities and differences between:a. different isotopes of an…

A: (a) similarities and differences between isotopes of an element: Various isotopes of an element have…

Q: Sulfur is a bright yellow solid at room temperature. It is one of the components in gunpowder,…

A: The answer for first three subparts are given below. Kindly repost the subparts as separate…

Q: Q.3 A neutral atom has a mass number of 80 and has 45 neutrons. Write its complete symbol. Q.4 An…

A:

Q: 16. Write the letter of the correct answer. When chlorine occurs in nature, there are three atoms of…

A: There are two isotopes of chlorine------- One is 35Cl, the percentage of the abundance in nature of…

Q: 1. Write the number and name (if any) of the group (family) to which each of the following elements…

A: In the periodic table,  The vertical columns are called groups. There are 18 groups in total in the…

Q: Which of the following sets illustrates the Law of Multiple Proportions? O a. Li2O, Na2O, K20 O b.…

A: According to the Law of Multiple Proportions, when two same elements form two or more compounds, the…

Q: Name the following: Two elements belonging to the same period as Iron. Two elements belonging to the…

A: Note: According to our guidelines we are supposed to answer only first three subpart. Kindly repost…

Q: A sample of a new element (X) was found to contain the following mixture of isotopes: 65% X-55, 20%…

A: Average atomic weight is the sum of the masses of the individual isotopes each multiplied by its…

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.