Which characteristic tells you an element is likely a non-metal? Has a shiny/metallic luster Not a good conductor of heat/electricity O Can be deformed without breaking Is from the left side of the periodic table

Q: the periodic table, classify these elements as metals, nonmetals, or metalloids. Не Fe K # metal #…

A: Si (Silicon) is metalloid   He (Helium) is non metal

Q: Explain the mechanism of nature on how other elements higher than Iron is being formed.

A:

Q: Which of water, iron, ammonia, chromium, radon, and silicon are chemical compounds as opposed to…

A: We have to write the chemical compounds as opposed to elements

Q: Helium rarely combines with other elements. Chemists have placed helium on the far right end of the…

A: Given  helium in the right end in periodic table  required name of column of He .

Q: In a scanning electron microscope, select the correct answer Select one: O a. can be used to image…

A: In a scanning electron microscope, the electron beam can penetrate through all the sample

Q: spectra can be broadly classified into two categories. They are: a.) Atomic and molecular spectra…

A: Required : Classification of spectra :

Q: Write the complete nuclear symbol (with neutron number) for each. (Enter your answer in the form…

A: Isotopes of an element have same atomic number but different mass number. Different isotopes of an…

Q: The outermost shell is known as.., and electrons that are in orbits farther from nucleus are…

A:

Q: One amazing and useful fact about nature is that different elements and molecules each have a unique…

A: Introduction: Study of the different astronomical object is the fascinating approach towards the…

Q: Consider the following atoms: A. Gold, B. Copper, C. Carbon, D. Silver. Consult the periodic table…

A: Part a) A. Mass No. of Gold = 197 B. Mass No. of Copper = 63 C. Mass No. of Carbon = 12 D. Mass No.…

Q: The first scientist who was able to separate two isotopes of neon was O Henry Noseley Marie Curie…

A:

Q: Which substance is an element? O 1. CH4 O 2. NaCl O 3. N2 O 4. NO2

A: N2 is an element. N2 is the nitrogen atom or element.

Q: Need help with a design on the carbon separator. The separator that is detailed here works for…

A: The diagram of the carbon separator is as follows,

Q: Based on their locations on the periodic table, which two elements would you expect to form positive…

A: Boron and aluminum are the two elements which form ions of +3 charge.

Q: State what most a particles being straight on suggests about the structure of the atoms in the metal

A:

Q: The simplest type of atom to exist is the . atom a. охудen b. hydrogen O C. helium d. boron

A:

Q: Number of Electrons Atomic Number Element name Element Symbol

A: Done

Q: Express the nuclear composition for each below: (a) C-14 (b) a common stable Potassium atom (c)…

A:

Q: 30 As the atomic number increases across period 3 of the periodic table (A) (B) (C) (D) The…

A: This can be easily be solved by applying the basic concept of periodic table.

Q: An atom becomes a positive ion because? A) atom is losing some of its electrons B) Atom gains…

A: An atom is considered to be made up of protons and neutrons (which constitute the nucleus) and…

Q: How many unpaired electrons are present in the isolated carbon atom ( atomic number = 6)' A. none B.…

A: To find: How many unpaired electrons are present in the isolated carbon atom (atomic number = 6).…

Q: a neutral atom gains one or more electrons and is now called a a. negative ion b. positive ion…

A: Answer :-       (a) negative ion  Because  When an an atom gains or loses an electron . The atom is…

Q: Chlorine has 17 electrons. According to the modern atomic theory, how many electrons are found in n…

A: Number of electrons found is n = 2

Q: Argon and potassium are neighbors in the periodic table but have very different sizes—a potassium…

A: The ionization energy is the minimum energy required to remove the electrons from the outermost…

Q: According to the modern atomic theory, how many electrons are found in n = 2?

A: According to modern atomic theory ,nth shell can have maximum  2(n2) electrons.

Q: how much charge is present in a container havinf 1 atom of hellium

A: SOlution:

Q: (hydrogen iodide, the superscripts represent the atomic mass number) Calculate the effective force…

A: solution is given as

Q: when an atom loses an electron it becomes: A) neutron B) negative ion C) positive ion D) none of the…

A: An atom is electrically neutral that means the number of electrons in the atom is equal to the…

Q: Which of the following is CORRECT? O 1. calcium : nonmetal O 2. radon : metal 3. silicon : metal O…

A:

Q: Charge carriers in a metal are electrons rather than protons. This is due to the fact that electrons…

A: Electrons are lighter and away from the nucleus, but none of these characteristics explain why they…

Q: An element is a pure substance which cannot be broken down by chemical means, consisting of one kind…

A: Required :  What is an element.

Q: Comple.. e table below, using the diagram of an atom shown at right. Properties of subatomic…

A:

Q: Which element rarely reacts because it has 8 electrons in its outer shell? O A. Krypton O B.…

A: Since Krypton is a noble element which rarely reacts and all noble element has 8 electrons in its…

Q: Magnesium belongs to which representative group? halogens noble gases alkaline earth metals alkali…

A: The atomic number of magnesium is 12 which has an electronic configuration Ne3s2.That means it…

Q: What is a compound? Cite three examples.

A: A chemical compound is any substance composed of molecules consisting of atoms of two or more…

Q: Using the periodic table, Terry draws a model of a helium atom and a hydrogen atom. Match the number…

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

Q: Describe the basic structure of the atom, the substructure of all matter.

A: Structure of an atom. The atom is comprised of electron, proton and neutron. They are the subparts…

Q: Elements chemically combine to form 1. atoms. O 2. other elements. 3. isotopes. 4. mixtures. 5.…

A: Elements chemically combine to form compounds.

The Bohr model

Students often get confused between Rutherford’s model and Bohr model of an atom. They interpret the postulates of both these models to be the same, which is incorrect. Rutherford’s model differs from Bohr’s model in the following ways: