Which of the following metals is least chemically reactive?  potassium  sodium  iron  magnesium  calcium

Q: Which of the following pairs of atoms include a metal and a non-metal? 4 a) K and O b) P and Cl c)…

A: Most of the elements of the periodic table are metals. The metals are situated on the left-hand side…

Q: Which of the following exists in nature as a diatomic molecular element?  Group of answer choices…

A:

Q: A sample of an iron alloy contains 90.2 g Fe, 2.15 g C, and 1.01 g Cr. Calculate the percent by mass…

A: Total mass of the alloy = mass of Fe + mass of C + mass of Cr = 90.2 + 2.15 + 1.01 = 93.36 g

Q: (1) Either 2 + 2 is 0 or gold has atomic number 79; (2) 2 + 2 is not 0; thus, (3) gold has atomic…

A: The Good argument3)Gold has atomic number 79which is good argument1) & (2) are not good…

Q: An Element from Group 1A and Group 7A (Periods 2-6) shared a Chemical Bond which formed a solid…

A: Here is the answer

Q: whats wrong in this    Lithium is a main group metal and sodium is a main group metal. Lithium is…

A: As per the given information, Lithium is a main group metal and sodium is a main group metal.…

Q: Which statement is true about elements? An element is made of only one kind of atom Water is a…

A: An element is defined as substance which contains same type of atoms, and no other atoms. Has a…

Q: What do these four elements have in common? Hydrogen (H) be Oxygen (0) 4e 2e Carbon (C) Na 2e 1e Be…

A: We are given structures of 4 elements we need to describe which thing is common to all.  In an atom…

Q: Part 2: Color land labell each section of the Representative Elements a unique shade. Color the…

A: Representative elements are main group elements. They are s-block and p-block elements. There are…

Q: What does the crystalline structure of metals resemble?     A   Repetition of the metals neutrons…

A: The metals are electropositive and they lose electrons very easily. After the removal of electrons…

Q: The "cards" are separated top to bottom by color. What are the common characteristics of the cards…

A: Sepration of cards on the basis of color means  they will have same type of physical  and chemical…

Q: Which of these elements is chemically similar to magnesium? O Sulfur Calcium Iron O Nickel Potassium

A: The elements placed in same group of the periodic table have same number of electrons and hence are…

Q: 2. Balance the following equations (in the formation of heavier elements). a.*He +He - Be b. “He +n…

A: Given nuclear equations are :  a). 4He + 4He -----------> Be  b). 4He + n -------------> 4He…

Q: Y What element is represented in question 33? O Sodium O Boron O Carbon O Sulfur

A:

Q: Select all of the following elements that are categorized as non-metals. OA. Ag O B. K O C.B O D.S O…

A: Non metals : These are the elements which are placed to right corner of the periodic table and have…

Q: 6. Boron 7. Yttrium 8. Beryllium 9. Gallium 10. Mercury

A: Write electronic configuration of the given element---

Q: elements as a metal, non metal or metalloid

A:

Q: potassium and sulfur Express your answers as ions and chemical formula separated by a commas.…

A:

Q: Which of the listed elements would meet all of the following criteria? 1. transition element 2.…

A: # Transition elements: Transition elements are the d-block and f-lock elements present at the center…

Q: What is the percentage of metal in the compound Iron (III) Chromate (Fe2(CrO4)3)? А. 24.30% В.…

A:

Q: What is the most reactive metal to least reactive metal out of: Zinc Tim  iron  magnesium…

A: Metals are good conductor of heat and electricity for example: aluminium, copper whereas non metal…

Q: When trying to identify an unknown element, a scientist determines what other elements the unknown…

A: To identify the unknown elements, its chemical properties should be studied.  Chemical properties…

Q: Give the ions present and their relative numbers in iron(II) phosphate. Select one: 3- a. 1 Fe 2+…

A: Following are the relative no. Of  respective ions in the given complex.

Q: 7. Proteins and carbohydrates consist primarily of carbon, hydrogen, and oxygen; these two molecules…

A: 1) Each atom has a nucleus made up of protons and neutrons.       2) In atoms, the number of protons…

Q: How many core electrons does nickel contain? O 26 O 18 O 2

A: How many core electron in Nickel ?

Q: All metallic elements are solid at room temperature except _________. A. sodium B. calcium C.…

A: At room temperature, mercury is not at solid state. Mercury is  liquid above 0°C Temperature This is…

Q: Which of the following elements would be expected to have chemical and physical properties most…

A:

Q: A. TRUE OR FALSE. Write T before each number if the statement is correct statement is incorrect. anu…

A: Note : As per our guidelines ,we are supposed to answer only first question (Section A) ,Kindly…

Q: Which of the following elements is the largest?   a barium b titanium c rubidium d sodium

A: Atomic size decreases across a period from left to right, while increases down the group.

Q: Give the ions present and their relative numbers in iron(II) phosphate. Select one: a. 3 Fe2+ and 2…

A: We have to predict number of ions in iron(II) phosphate.

Q: write the word or words that best complete each statement. The natural magnet discovered by the…

A: Following are the appropriate answers of the given questions.

Q: TRUE for non-metal elements? Non-metals do not conduct electricity well Non-metals are represented…

A: Yes non metals do not conduct the electricity well as because they do not have/posses free electrons…

Q: Identify the scientific law that is used in the process of balancing chemical equations. the law of…

A: 1. Given that : We have to identify the scientific law that is used in the process of balancing…

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: Of the elements listed below, which one would be a poor conductor of heat and electricity? a) Mg b)…

A: Which element among the following Mg, CS, Se, Sn & Zn   is poor conductor of heat and…

Q: Which statement is incorrect? Elements are building blocks for compunds. An atom is the smallest…

A: The detailed explanation of the given statements is as follows:   Statement true/false…

Q: In chemical reactions, sodium (Na) is more likely to behave similarly to which element?   a.…

A: Chemical properties of the element depends upon the valence shell electronic configuration. Elements…

Q: What is the percent abundance of the rarest of three iron isotopes

A: Introduction: We have to tell the rarest abundance of iron in three isotopes.

Q: The process of iron combining with oxygen to form rust is considered a chemical change because rust…

A: Rusting It is an oxidation reaction. The iron reacts with water and oxygen to form hydrated…

Q: Write the symbol for every chemical element that has atomic number greater than  9  and atomic mass…

A: chemical element that has atomic number greater than 9 is Neon

Q: Which of the following elements is the least metallic?   a. Aluminum   b. Phosphorus   c. Magnesium…

A: The least metallic elements are generally placed at the right-side upper corner of the periodic…

Q: e+ lithium n phosphate + lithium

A: Reaction is based on electrochemical series.  Balanced chemical reaction  1.  Fe + Cu(NO3)2 ---->…

Q: Identify the group and period to which each of the following elements belongs: Si element number…

A: 1) Silicon i.e Si : Silicon is an element which is present in the carbon family in the periodic…

Q: In chemistry, a formula is used to represent ______. Group of answer choices a compound an element…

A: In chemistry a formula is used to represent an element, a metal and a compound such that it uses…

Q: 33 - Which of the elements has similar chemical properties with sulfur (S) element? O A) Xe O B) Rb…

A: The element which has a similar chemical properties with the Sulfur element to be determined.

Q: Classify each of the following as a METALor a NONMETAL: Sulfur 1. Metal Calcium 2. Nonmetal Lithium

A: Metals are those elements which have tendency to loose electrons while non metals have tendency to…

Q: 41. Which of the following statements are true of the chemistry of Group IV elements of the Periodic…

A: Group IV Element: These group have elements Carbon, Silicon, Germanium, Tin and lead. This group…

Q: 1) indicate whether the following properties are representatives of a metal, semi metal, or non…

A: The elements that have a lustrous appearance and the high conducting property are known as metals.…

Q: The relative atomic masses of elements are seldom whole numbers because A. atoms of some elements…

A:

Q: FORMULA WRITING. Write the formula for each of the following compounds and identify the metal as…

A: Barium nitrite consists of a Ba2+ cation and a polyatomic anion NO2-. The respective oxidation…

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.