Polyatomic anion - Study guides, Class notes & Summaries

significant figures a digit that is either reliably known or closely estimated Significant Figure Rules 1. All non-zero digits are always significant 2. Zeroes between non-zero digits are always significant 3. Zeroes to left of first non-zero digit (either before or after decimal point) are never significant 4. Zeroes to the right of last non-zero digit a. after decimal point are always significant b. which are before decimal point are not significant conversion factor relationship...

molecular mass (molecular weight) correct answer: the sum of the atomic masses, in atomic mass units, of all the atoms in the formula of a compound empirical formula correct answer: a chemical formula showing the ratio of elements in a compound rather than the total number of atoms Avogadro's number (Mole) correct answer: 6.02 x 10^23 proton correct answer: A subatomic particle that has a positive charge and that is found in the nucleus of an atom neutron correct answer: A suba...

CHEM 1201 Exam 1 With 100% Correct And Verified Answers 2024 CO32- - Correct Answer-Carbonate (polyanion) NO3- - Correct Answer-Nitrate (polyanion) PO43- - Correct Answer-Phosphate (polyanion) SO42- - Correct Answer-Sulfate (polyanion) ClO4- - Correct Answer-Perchlorate (polyanion) How many oxygen are in a polyatomic anion named per-___-ate? - Correct Answer-4 oxygen How many oxygen molecules are in a polyatomic anion that's name ends in -ate? - Correct Answer-3 oxygen How...

CHEM 104 EXAM #2|Questions with 100% Correct Answers Periods are horizontal rows(1-7) groups are vertical columns (1A-8A) Metals are 70%, shiny, ductile, heat, electricity Non-metals are dull, brittle, good insulators metalloids are better conductors than non-metals, not as good as metals 3B-12B is transition metals 1A-8A is representative elements Alternative System 1-18 1A alkali metals 2A Alkaline Earth Metals 3A-6A no common names 7A Halogens -1 8A Noble Gases P+ ...

matter - correct answer takes up space and weighs something, has volume and mass, and thus density density - correct answer g/mL mixtures - correct answer two or more compounds mixed together compounds - correct answer groups of identical molecules 3 types of mixtures - correct answer ...

1. In terms of electrons, what is an excited state? Give an example of an electron configuration for an excited state. (1 points) 2. Give the ground state electron configuration for Fe. (1 points) 3. What is a valance electron? How many valance electrons does Si have? (1 points) 4. What is the shorthand electron configuration of a potassium ion (K+)? (1 points) 5. Give the chemical formula (with charge) for each of the following polyatomic ions: (0.5 points each, 2.5 points total) 6. What ...

Honors Chemistry Midterm Review Verified Answers Chemistry: ️ The study of matter, its properties, and the changes it undergoes. Element: ️ A substance that cannot be broken down any further into simpler substances. Compound: ️ Composed of two or more separate elements. Chemical Reaction: ️ A process that involves the rearrangement of the molecular or ionic structure of a substance. Physical Change: ️ Changes that do not result in the formation of a new, d...

Mass Number - ANSWER-total number of neutrons and protons in an atom; # protons + # electrons p - ANSWER-Most nonmetallic elements are found in which block of the periodic table? Positive matter is concentrated in the central core - ANSWER-Ernest Rutherford disproved J.J. Thomson's plum-pudding model of the atom by showing that... Potassium - ANSWER-Plants use up copious amounts of which alkali metal, preventing most of it from being washed out to sea? 2:1:1:2 - ANSWER-What is the r...

Atomic Number - The number of protons in the nucleus of an atom. The atomic number of an element never changes, meaning that the number of protons in the nucleus of every atom in an element is always the same. Hydrogen = 1, Carbon = 6, Oxygen = 8 (located on top of element of periodic table) Mass Number - # of neurons + # of protons = mass number (located on bottom of periodic table) Isotopes - Let's say an atom is missing a neutron or has an extra neutron. That type of at...

a unit of matter that results when two or more atoms are joined by covalent bonds molecule a bond resulting from the electrostatic attraction of a cation for an anion ionic bond Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:03 / 0:15 Full screen a bond characterized by an even distribution of charge; electrons in the bonds are shared equally by the two atoms non polar covalent bond charged group of more than one k...