1. a) List the five main ideas of the particle theory. 1. b) Use the particle theory to explain why water changes from a solid to a liquid when it is heated.

Q: Examine the statement “No two elements have the same line spectrum.” Explain why this can be used…

A: Every element has a unique line spectrum. This is because the energy absorbed by the electron is…

Q: 2. Define these terms and explain why these names are used for of elements: a. Family

A: Element  are  the pure substance consisting only of atoms  and  elements cannot  be broken down into…

Q: Which arrangement of elements did Mendeleev find produced a repeating pattern of properties?

A: According to Mendeleev Periodic law, the periodic properties of the elements are repeated after…

Q: Give some examples of metals and nonmetals?

A: Some examples of metals and nonmetals have to be given below.

Q: A chemist repeats the gold experimentbut she uses of aluminum atomic number 19) of gold (atomic…

A: Aluminum foil is usually about 0.03mm in thickness while gold (more malleable than aluminum) can be…

Q: Philosophers and scientists came up with the early ideas of particles. Democritus believed that…

A: Matter is made of small building blocks called atoms.

Q: How are the concepts of an atom and an element related? What causes elements to differ?

A: A particular atom will have the same number of protons and electrons and most atoms have at least as…

Q: Describe the process of determining the number of Subatomic particles in Atoms?

A: An atom is the smallest invisible and indivisible particle of matter. However, an atom still…

Q: What is the difference between atoms, molecules and compounds?

A: Atoms are the fundamental units of molecules and compounds. It consists of a positively charged…

Q: Who designed the periodic table of the elements?

A: The detailed solution of your question given below-- Several scientists work in the periodic table…

Q: Distinguish between Atoms and Molecules?

A: The matter is divided into smaller particles called molecules whereas the molecules are made up of…

Q: 31. If atoms are mostly empty space and atoms compose all ordinary matter, why does solid matter…

A: Everything is composed of atoms around us. As it is known that atoms can attract each other with a…

Q: Which of Dalton’s postulates about atoms are inconsistent with later observations? Do these…

A: In 1808 John Dalton has provided the first atomic theory. He has stated that all matter is made up…

Q: Which of the following physical properties do you think would help you determine whether the shiny…

A: There are many properties which can be used to determine whether the shiny nugget is gold or not .…

Q: define element and atom?

A: An element is a pure substance made up of only one kind of atom. An atom is the basic unit of all…

Q: difference between metal and non metal?

A: Here we are asked to write the difference between metal and non metal.

Q: C The radius of a nickel atom is 125 pm. How many nickel atoms would have to be laid side by side to…

A: We are given : radius of nickel atom (r) = 125 pm distance (d) = 1.11 mm number of nickel atoms (n)…

Q: 1. Models come in many forms including physical, 2-dimensional, conceptual, computer, and…

A: Given: Two dimensional models, conceptual, computer and mathematical models To find: scientist use…

Q: 35. What is the total number of electrons in a phosphorus ion?

A: The phosphorous atom symbol is P which has the atomic number 15.

Q: What are some characteristic properties of elements to the left of the elements along the…

A: The staircase in the periodic table is a dividing line between the metals and nonmetals.  The…

Q: How did other Greek philosophers like Plato and Aristotle think about the elements?

A:

Q: what philosophy you believe, the atomism or the natural elements? Why?

A: Atomism Is a philosophical concept. It propose that physical univers is composed of invisible…

Q: What subatomic particle is the primary concern of chemistry?

A: Bohr model gives information about three basic subatomic particles.

Q: What are isotopes? What is the percent natural abundance of isotopes?

A: Isotopes are stable as well as radioactive in nature.

Q: Dmitri Mendeleev and Lothar Meyer independently came to the same conclusion about how elements…

A: Introduction : We need to tell whether the given statement is true or false .

Q: The most abundant isotope of Hydrogen has a mass of 1 amu.  Therefore, the average atomic mass on…

A:

Q: True or False -Atomic theory doesn't need to be taken seriously because it's just a theory ....

A: Given statement is, Atomic theory doesn't need to be taken seriously because it's just a theory

Q: is chlorine gas an element ?

A: The simplest chemical substance which made up of atoms with the same number of protons and it cannot…

Q: Which is a compound? A. A piece of pure zinc metal B. A molecule made of nitrogen and oxygen C. An…

A: Compound: A molecule consisting of two different elements is called compound

Q: How many electrons are in gold atom? Does protons also take part in chemical reaction?

A: Gold is a chemical element with the symbol Au and atomic number 79, making it one of the higher…

Q: One of the big problems in chemistry is our dependence upon our five senses (macroscopic…

A: The Brownian motion explain the random movement of atom and molecules in a gaseous state where the…

Q: What is the Law of Multiple of Proportions?

A: Law of Multiple Proportions ----- When two elements react to form two or more compounds, than the…

Q: Compounds are composed two or more elements chemically combined while mixture are composed of…

A: A question based on introduction to chemistry that is to be accomplished.

Q: Please define the atomic theory proposed by scientist considering to experimental set up.

A: Various experiments defined the theory of the atom.

Q: What is the volume of a molybdenum atom in microliters?

A: 1 cm3 = 1 mL  1 mL = 0.001 L  1 mL = 1000 microliters

Q: Why chemists use models to study atoms?

A: An atom is composed of three component particles which are electrons, protons and neutrons.  The…

Q: What did Mendeleyev do with his Table of the Elements that surprised people?

A: In the given question  Mendeleev arranged the elements that elements with the same physical and…

Q: What is the chemical formula for a molecular model with 2 nitrogen atoms and 4 hydrogen atoms? Also…

A: a) Since the model is having 1 black and 4 white balls. Hence it is having 1 carbon i.e C and 4…

Q: Summarize the history of the atomic idea?

A: Greek philosophers. Leucippus and Democritus put forward the idea of atoms as far back as the fifth…

Q: A new transition metal, bartium, has been discovered, which is represented by the chemical symbol…

A:

Q: State and explain the law of conservation of mass.

A: According to law of conservation of mass, the total mass of the reactant is equal to the total mass…

Q: What is modern Atomic Theory?

A: Given term, Modern atomic theory Atom - a fundamental particle of matter (i.e. anything that can be…

Q: In general,the color that we see is __to the color absorbed.  What words should be put in the…

A: To find: In general the color that we see is _ to the color absorbed.

Q: Who was the first scientist to classify elements according to their properties?

A: There are over hundreds of elements known to us. To avoid confusion, scientists need to classify…

Q: Mercury has an atomic number of 80 and an atomic mass of 200. Mercury has number of protons, number…

A:

Q: What were the challenges that John Dalton went through  including how he got their knowledge to be…

A: John Dalton most famous discoveries include Dalton atomic theory Dalton Law of Partial Pressure.(…

Q: How many electrons are in 1 coulomb?

A: Particles that reside inside an atom are called subatomic particles. These particles are electrons,…

Q: n elemental metal contains how many types of atoms?

A: Elements are the substance that is composed of a single type of atoms.