How many valence electrons are in the neutral element sodium? 11 O 2 0 5

Q: How many electrons are in the selenium (Se2-) ion? O 36 O 32 O 33 O 34 O 35

A: In order to determine the total number of electrons, it is very important to know the atomic number…

Q: How many electrons are there in a Au?+ cation? O 78 O 77 O 81 O 80 O 79

A: The cation given is Au2+.

Q: what is the name of the compounds: Iodine Tribromide Iodine Tetrafluoride

A: The name of the compounds is written by representing oxidation number of central atom of the…

Q: Write formulas for lithium oxide, tin(II) fluoride, and lithium nitride

A: The formula of the given compounds has to be given,

Q: The hydroxides formed by three elements of period 3 are given in the following table.   Period…

A:

Q: fluorine atom has 9 electrons - 7 in its outer shell and 2 in its inner shell. How many electrons…

A: To become fluoride ion, fluorine must have 8 electrons in its outermost shell.

Q: Barium reacts with a polyatomic ion to form a compound with the general formula Ba3(X)2. What would…

A:

Q: The noble elements are the most reactive of the elements listed on the periodic table. O True False

A: The noble gas elements are present in the 18th group of the periodic table. The elements helium…

Q: Write the chemical formula for this molecule: I carbon nitrogen oxygen fluorine key hydrogen sulfur…

A: A chemical formula is a way of expressing information about the atoms that constitute a particular…

Q: the correct formula between x and oxygen has a chemical formula of X2O. which element would x most…

A: The objective of the question is to identify the element 'X' in the chemical formula X2O.

Q: Based on common charges, which formula for an ionic compound is incorrect?

A: Ionic compounds are made up of a cation and an anion, We have been asked to choose the formula for…

Q: How many electrons are in hydrogen

A: Given element,       Hydrogen (H)

Q: How many atoms of oxygen are indicated in the formula Fe(NOa)3? O 1 O 3 O 6 0 9

A: Calculate numbef of O atom in Fe(NO3)3 ?

Q: Write an equation that shows the formation of a barium ion from a neutral barium atom. Represent…

A: Barium atom generally loses two-electron to convert into ions. Symbol of barium atom = Ba    Symbol…

Q: Barium reacts with a polyatomic ion to form a compound with the general formula Ba3(X)2. What would…

A: Barium belongs to second group of periodic table in which it can loose 2 electrons to form a…

Q: A neutral oxygen atom has eight electrons. How many electrons does O²⁻­‐ have

A: Oxygen has 8 electrons and its atomic mass is 16 g/mol.

Q: How many hydrogen atoms are indicated by the formula (NH4)2C7H10O2? 18 15 28 8 14

A: The given formula is as follows: (NH4)2C7H10O2 The given formula can be simplify as follows:…

Q: The name for the diatomic binary compound formed from fluorine and chlorine is

A: Given :- chlorine + fluorine →  To identify :- diatomic binary compound formed in above situation

Q: McQuarrie Rock Gallogly Initial-rate data at a certain temperature is given in the table for the…

A:

Q: Which of the following formula/name pairs is incorrect?     Sr(OH) 2 strontium hydroxide…

A: The incorrect formula/name of the pair can be identified,

Q: Write an equation that shows the formation of a cesium ion from a neutral cesium atom.

A: The chemical equation that shows the formation of a cesium ion from a neutral cesium atom is

Q: Select all the elements whose elemental forms have covalent bonding: Hydrogen Helium Lithium…

A:

Q: The molecular formula of a compound whose simplest formula is CHO2 and whose molar mass is 135.0…

A: Since you have posted multiple questions, we are entitled to answer the first only.

Q: Lrrr ruler of Omicron Persei 8e hates chemistry The periodic table on Omicron Persei 8 looks…

A: When sodium has +2 charge and sulfide has a -3 charge. What is the formula for potassium oxide.

Q: 3 1 I 1 5 2 3 4 6 7 9 10 11 8 12 CHEMISTRY Writing Chemical Formulae for Ionic Compounds with…

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Q: How many electrons are there in a Au2+ cation? O 78 O 77 O 81 80

A: The number of electrons present in Au = 79. Its electronic configuration is: [Xe] 4f145d106s1

Q: Arsenic is a toxic solid often used in the past as a component of pesticides. How many electrons are…

A: Atoms can be of three types- Neutral, positively charged and negatively charged. Neutral atom is…

Q: Which of the following are paired correctly? Chlorine Cl2 Sulfur S4 Phosphorus Nitrogen N

A: We know that, Chemical symbol of , Nitrogen is N

Q: Which of the following is an atom, molecule, ion, element? Cl- O2 HCl Ne

A: 1. Cl- is an ION. Ion is an atom or a molecule with some net charge on it, formed by loss or gain of…

Q: How many Nitrogen atoms in the following: 4C3H5(NO3)3

A: We have to calculate the number of N atom in the formula

Q: Which of the following is NOT one of the seven

A: In diatomic gases,  gases consist of two elements and form stable molecule. N2 , H2, Br2 are…

Q: lon Commonly Formed Name of element SYMBOL Number of Number of electrons in ion protons in ion…

A: Periodic table consists of elements which are arranged in different blocks according to the…

Q: How many valence electrons are in the ion No^-? Describe how you obtain the numbers of valence…

A: This is the concept of counting the electrons of outermost shell which is called valence shell and…

Q: An ion from a given element has 9 protons and 10 electrons. What is the charge on the ion?  What…

A: There are two questions so in the first question the given condition is like below An element has 9…

Q: What is the formula of the ionic compound composed of the ion Al3+, and the ion, O-2?

A: The formula for the ionic compound containing Al3+ and O2- is :…

Q: Write the chemical formula for this molecule: Ju I II I I Drag the slider to get a different view of…

A: A chemical formula is a way of expressing information about the atoms that constitute a particular…

Q: Which of the following is an element? Fe,(SO,), Li O2

A: The substances that have a tendency to occupy space are considered as matters. The matters can be…

Q: How many hydrogen atoms are indicated by the formula (NH4)2C7H10O2?

A: Given formula (NH4)2C7H10O2 =…

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.