Dmitri mendeleev - Study guides, Class notes & Summaries

MULTIPLE CHOICE 1. The term “atom” was first used by the _____. a. Ethiopians b. British c. Greeks d. Romans ANS: C The term “atom” was first used by the Greeks DIF: Moderate REF: page 27 OBJ: Relate the history of the term “atom.” 2. The first person to describe an element as being composed of identical atoms was _____. a. J. J. Thomson b. John Dalton c. Dmitri Mendeleev d. Niels Bohr ANS: B The first person to describe an element as being composed of identical atoms ...

Element - pure substance that cannot be broken down into simpler substances by a chemical reaction Dmitri Mendeleev - formulated the periodic table

HESI Chemistry Questions with Answers and Explanations 1. Which of the following substances allows for the fastest diffusion? A. gas B. solid C. liquid D. plasma Explanation: Diffusion is fastest through gases. The next fastest medium for diffusion is liquid, followed by plasma, and then solids. In chemistry, diffusion is defined as the movement of matter by the random motions of molecules. In a gas or a liquid, the molecules are in perpetual motion. For instance, in a quantity of seemi...

1. Which of the following substances allows for the fastest diffusion? A. gas B. solid C. liquid D. plasma Explanation: Diffusion is fastest through gases. The next fastest medium for diffusion is liquid, followed by plasma, and then solids. In chemistry, diffusion is defined as the movement of matter by the random motions of molecules. In a gas or a liquid, the molecules are in perpetual motion. For instance, in a quantity of seemingly immobile air, molecules of nitrogen and oxygen are c...

HESI CHEMISTRY QUESTIONS WITH ANSWERS AND EXPLANATIONS 1. Which of the following substances allows for the fastest diffusion? A. gas B. solid C. liquid D. plasma Explanation: Diffusion is fastest through gases. The next fastest medium for diffusion is liquid, followed by plasma, and then solids. In chemistry, diffusion is defined as the movement of matter by the random motions of molecules. In a gas or a liquid, the molecules are in perpetual motion. For instance, in a quantity of se...

HESI Chemistry Questions with Answers and Explanations 1. Which of the following substances allows for the fastest diffusion? A. gas B. solid C. liquid D. plasma Explanation: Diffusion is fastest through gases. The next fastest medium for diffusion is liquid, followed by plasma, and then solids. In chemistry, diffusion is defined as the movement of matter by the random motions of molecules. In a gas or a liquid, the molecules are in perpetual motion. For instance, in a quantity of se...

Periodic Properties of the Elements Objectives  Analyze trends within groups and periods on the periodic table of elements. (Exploration 1)  Determine the identity of seven mystery elements based on periodic table trends. (Exploration 2) Description of Activity In this activity, a partial periodic table is provided. You will select an element and evaluate the element’s physical properties. After selecting the element, you will analyze the patterns of these properties as they occ...

HESI A2 CHEMISTRY QUESTIONS WITH ANSWERS AND EXPLANATIONS 1. Which of the following substances allows for the fastest diffusion? A. gas B. solid C. liquid D. plasma Explanation: Diffusion is fastest through gases. The next fastest medium for diffusion is liquid, followed by plasma, and then solids. In chemistry, diffusion is defined as the movement of matter by the random motions of molecules. In a gas or a liquid, the molecules are in perpetual motion. For instance, in a quantity of s...

1. Multiple Choice: Which of the following scientists was awarded the Nobel Prize in 1911 for the discovery of the radioactive elements, radium and polonium? w) John Dalton x) Dmitri Mendeleev y) Emil Fischer z) Marie Curie ANSWER: Z -- MARIE CURIE 2. Short Answer: Who was awarded a Nobel Prize in 1911 for the discovery of the radioactive elements, radium and polonium? ANSWER: D -- MARIE CURIE 3. Multiple Choice: Which of the following pairs of German scientists discovered the atomic f...

HESI A2 ENTRANCE CHEMISTRY EXAM 2023 QUESTIONS &ANSWERS LATEST UPDATES HESI A2 CHEMISTRY V1/V2 FILE 1. If a Hydrogen isin a compound, what would its oxidation number be? +1 2. What isthe oxidation number of any simple ion? +1 or -1 depending on the charge of the ion 3. How many kilograms are in a pound? 0. kg 4. What is the temperature for freezing point of water in Celsius? 0 degrees Celsius (32°F for Fahrenheit) 5. What is the conversion of Celsius to Fahrenheit? 0°C = 32°F 6...