2 Most of the elements are solids at room temperature. Give three examples of elements that are liquids at room tempera- ture, and three examples of elements that are gases at room temperature.

Q: The diameter of a silicon atom is 2.34 x 10-8 cm. If the silicon atoms were placed next to each…

A: Given:  Diameter of silicon = 2.34 x 10-8 cm Width of paper = 8.5 inch

Q: 2. Silver has an average atomic mass of 107.87 amu and has 2 isotopes. *Ag has a mass of 106.95 amu…

A:

Q: the symbol of the halogen with the most electrons Express your answer as a chemical symbol. ΑΣφ ?

A:

Q: What is the radius (in cm) of a pure copper sphere that contains 1.14 * 1024 copper atoms? [The…

A: Given information:

Q: (T/F) The atomic number of an elements tells us the number of protons and neutrons in an element.…

A: Hii there, since there are multiple sub parts posted. We are answering first three sub parts. If…

Q: 6. Students in a chemistry course were asked the following question on unit exam: "Draw a diagram…

A: 1. If we consider 1 circle as 1 atom then both A and B diagrams are correct, where Diagram A…

Q: Silicon has three naturally occurring isotopes (Si-28, Si-29, and Si-30). The mass and natural…

A: Isotopes are the atoms which have same atomic number and different mass numbers. Isotopes of an…

Q: 2. Which of the following statements is accurate? Explain. "The mass of the student is 56 kg." The…

A: Interpretation -  We have to explain that which statement is correct - "The mass of the student is…

Q: 2. The states that the total number of atoms does not change in a chemical reaction. 3. А combined…

A:

Q: 57. Which elements are alkaline earth metals?(a) sodium(b) aluminum(c) calcium(d) barium(e) lithium

A: The elements in the tabular form when arranged on the property of the increasing atomic number order…

Q: Samples of compound X, Y, and Z are analyzed, with results shown below. Compound X Description…

A: Law of multiple proportions: It states that when two elements combine with each other to form more…

Q: 1.Which of the following elements is not an alkali metal? a. Li b. Na c. K d. P

A: Note : As per our guidelines , we are supposed to answer first question please resubmit the other…

Q: . How many protons, neutrons, and electrons are there, respectively, in 69Se2- ?

A: Given    Element = Se   Number of proton , Neutron , electron  = ?

Q: 2 of 2 Explain why the atomic mass of an atom is a decimal number and how that value was determined…

A: In periodic table generally atomic masses are in decimal form because we know that almost for every…

Q: QI This question pertains to two isotopes, 17CI and 1¬CI Part A Fill in the following table Isotopes…

A:

Q: Naturally occurring copper exists in two isotopic forms: 63Cu and 65Cu. The atomic mass of copper is…

A: When there is more then one isotope then the molecular weight becomes fractional due to average…

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

A: Modern periodic table was first made by Dmitri Mendeleev. He is known as the father of periodic…

Q: Which elements have molecules as their basic units?(a) helium (b) oxygen(c) iron (d) bromine

A: The elements which have  molecules as their basic units has to be given,

Q: Which of the following gases are elements? O NH, O 0, O N,0 Rn Ar O 0, so, O H,S HCN NO NO, O He

A: Elements are the pure substances that are made up of only one kind of atoms, We are given some list…

Q: What is the edge length (in cmcm) of a titanium cube that contains 2.41×10242.41×1024 titanium…

A:

Q: 2.1. In the following drawing, the green spheres represent atoms of a certain element. The purple…

A: Hey there thankyou for the question.    By law of constant proportion all samples of a pure compound…

Q: Differentiate between an atom, an element, and a molecule.

A: Element - are naturally occurring species  Atom-building block of molecule  Molecule - made up of…

Q: Isotope #3 • Element Symbol Ag • Nuclear Symbol Ag 81 35 • Atomic Number 35 • Mass Number 81 •…

A: The atomic number of an atom is the number of protons present in the atom. For a neutral atom, the…

Q: Explain the following statement: The smallest particles unique to an element may be atoms or…

A: An atom is formed of three main sub-particles namely, electrons, protons, and neutrons. Protons and…

Q: 1.) The measured mass of a sample would have which of the following units? A) g/cm B) g/mol C) g/cm3…

A: Four questions of MCQ type which are to answered.

Q: Which of the following could describe an element?   I II III All of them None of them

A: Matter: Matter can be defined as any component which occupies space and has mass.

Q: What is the symbol in the image below? I. 37 CI 17 lon Isotope Neutral Atom

A:

Q: An elemental molecule is a molecule containing: two or more atoms of two different elements in…

A: A molecule is an electrically neutral atom or group of atoms that can exist independently.

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: Which of the following statements about subatomic particles are true, and which are false? Drag the…

A: Any atom is made up of 3 subatomic particles. 1) electron  2) proton  3) neutron

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

A: Number of protons in a neutral atom is equal to its atomic number. Number of electrons in a neutral…

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

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Q: Identify the elements in each chemical formula, and give the number of atoms of each element. a.…

A: a. NaCN (sodium cyanide) Elements : Na , C and N. Number of C atoms = 1 Number of Na atoms = 1…

Q: 2. Write the symbol for each element · aluminium sulfate · kidney stones • component of teeth and…

A: The formulas of above components- Aluminum sulfate-Al2(SO4)3 Kidney stone-cacium oxalate stones are…

Q: Identify as true (T) or false (F): | Minerals separating from flowing water as stony deposits…

A: Since you have posted questions with multiple sub-parts, we are entitled to answer the first 3 only.…

Q: A penny has a thickness of approximately 1.0 mm. If you stacked Avogadro’s number of pennies one on…

A: The total distance covered by 6.022×1023 of 1.0 mm of penny is calculated as shown below. The total…

Q: True or false is an atom is the smallest building block of matter

A: False

Q: 8- Which of the following nomenclatures is the true? O A) N205 : Nitrogen Oxide O B) Cu20 : Cupper…

A: The correct names are as follow A) N2O5 = Dinitrogen pentoxide B) Cu2O = Copper(1)oxide C) Fe2O3 =…

Q: 7. For the following elements, give their name and their atornic number Name Atomic Number a. F b.…

A: Hi, as you have posted multiple questions and have not mentioned which question you want us to solve…

Q: In which group on the periodic table is Iron? O Alkali metal O Halogen Alkaline earth metal O…

A: A multiple choice question based on the position of Iron in periodic table.

Q: If 2% of the mass of a human body is calcium, how many kilograms of calcium are there in a 150-pound…

A: • The values provided in the question are:-  i) Mass of a man     = 150 lb      = 150 × 0.454 kg {∵…

Q: 60. Silicon has three naturally occurring isotopes (Si-28, Si-29, and Si-30). The mass and natural…

A: For isotopes , total abundance of all isotope in total is 100% . So we can use given abundance of…

Q: In the periodic table, do the chemical properties change more than through a period or through a…

A: Periodic table is table in which the elements are arranged based on there electronic configurations.…

Q: 14. One compound of elements X and Y contains 35.2% X (by mass); another compound contains 24.6% X.…

A: The chemical formula of compound is represented by the atoms of the elements as their chemical…