Which of the following elements is  NOT a noble gas at room temperature?  a. chlorine b. oxygen c. neon d. argon e. nitrogen

Q: Write the ion symbol for an atom with the given number of protons and electrons. a. 19 protons and…

A: The protons, neutrons, and electrons are the salient features of an atom. The protons present in the…

Q: 1 What is the charge on an atom of beryllium in an ionic compound? B. 2+ A. 1+ C. 3+ D. 4+ 2 What is…

A:

Q: Select all of the following that are consistent with modern-day atomic theory A. Each element is…

A: The minute unit of all existing elements (solid, liquid as well as gas) is frequently known as atom.…

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 of the following is a nonmetal? a. Lead b. Boron C. Arsenic O d. Sulfur

A: Metals- These are good conductors of heat and electricity. These are malleable and ductile. These…

Q: When atoms of the following elements form ions, what charge or charges would the ions have? a.…

A: Charge is determined based on octet rule

Q: Pls answer to all question, they are not that long.

A: Note - Since you have posted a question with multiple sub-parts, we will solve first three sub-parts…

Q: 1.Who created the first periodic table? 2. How did this Russian scientist first arranged the…

A: [1.] Dmitri Mendeleev  [2.] Petersburg( Russia), Russian chemist who developed the periodic…

Q: + а. Bohr b. Dalton C. Rutherford d. Thomson 3. Which atomic model was the first to show a nucleus,…

A: 27) in the Given figure, the model of an atom was proposed by Thomson.

Q: 21. What force holds electrons near the nucleus of the atom? A. Strong nuclear force B.…

A: From the concept of periodic trends of elements and atomic mass of elements the following questions…

Q: Aluminum has an atomic number of 13 and an atomic mass of 27. Aluminum (with NO charge) has a. 14…

A: Protons: Protons are positively charged subatomic particles found in the nucleus of an atom. The…

Q: What subatomic particles diated whether a bond is covalent or ionic?  A. Electrón  b. Alpha…

A: The particles given are electron, alpha particle, photon and light.

Q: Negatively charged atoms are called cations. A. True B. False

A: Ions are the species that carries charge. Ions can be an atom or a group of atoms carrying positive…

Q: Identify the following atoms using their symbols: a. contains 20 protons b. contains 12 electrons…

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

Q: From the experiments of JJ Thomson, which of the following is not one of his conclusions?   Group of…

A: From the experiments of JJ Thomson, which of the following is not one of his conclusions

Q: For an atom to be electrically neutral, it must have the same number of:   a. electrons and…

A: The charge on the proton is positive . The charge on the electron is negative . There is no charge…

Q: What are the elements in the A columns of the periodic table called a.Main group elements b.…

A:

Q: 55. In the periodic table, how many the following? a. Group 2A b. the oxygen family c. the nickel…

A: To find the number of elements present in the following groups.Concepts:The period table has 18…

Q: Define the term main group element. Then, determine the charge that an atom of each of the following…

A: We have been asked to define the term main group element and to assign charges to the atom when…

Q: How many protons and electrons are in each atom?a. radon b. magnesium

A: The atomic number of an element gives the number of protons. For a neutral atom, the number of…

Q: Which of the following species would be expected to have chemical properties most similar to those…

A: The physical and chemical properties of an element are determined by the number of electrons in the…

Q: Circle the following properties or descriptions that are different for 2 different  isotopes of the…

A: Isotopes can be defined as the variants of chemical elements that possess the same number of protons…

Q: Mark the following statements as true or false. If a statement is false, correct it to make a true…

A: To find: The given statements as true of false

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.