Halogens Study guides, Class notes & Summaries

the physical material of the universe. It is anything that has mass and occupies space. CORRECT ANSWER Matter is made up of relatively few elements. CORRECT ANSWER Matter The smallest building block of matter. Smallest particle that retains the chemical property of the element (O, He, S). CORRECT ANSWER Atom Each _______ is made of the same kind of atom CORRECT ANSWER Element Combination of atoms held together in specific shapes CORRECT ANSWER Molecule No fixed volume or shape, co...

Chemistry 101 Exam 1 WSU Questions and Answers Already Passed How many electrons can an orbital hold? 2 How many electrons does the second shell (n=2) hold? 8 How many electrons does the third shell (n=3) hold? 18 What do like charges do? Like charges (positive-positive or negative-negative) repel each other What is the generic valence level electron configuration for the halogens (group 7A)? ns2np5 What is the generic valence level electron configuration for the alkali met...

Chlorine and iodine are classified as - ANSWER halogens Obligate aerobes can only live - ANSWER when oxygen is present Microorganism found thriving in a the permafrost region of the Arctic are - ANSWER pychrophiles Facultative halophiles - ANSWER tolerate an elevated salt concentration in the environment

Edexcel iGCSE Chemistry, question and answer with rated solution Experiment for Diffusion? 1) HCl placed at one end of the test tube, ammonia solution at the other. 2) Where they meet, a ring of Ammonium Chloride appears. 3) The diagram shows that the ammonia is closer to the ring, showing that ammonia must have travelled faster, showing it's a lighter gas. Experiment for Dilution? 1) Put a coloured substance in a solvent e.g food colouring in water. 2) Over the time, the colour le...

A buffered iodine is: A. used to slow down the "kill" time B. a phenol C. non-water soluble D. all of the above - Answer-Used to slow down the "kill" time A comparison Benchmark that is mandated by a governing agency and if not complied with, may cause a facility to be in violation and liable for a legal penalty is a: A. Regulation B. Statute C. Regulatory Standard D. Voluntary Standard - Answer-Regulatory Standard A disinfectant group that leaves a residual bacteriostatic film an...

This low-level disinfectant is incompatible with soap. (A) Alcohol (B) Phenol (C) Quaternary ammonium compounds (D) Ortho-phtalaldehyde C When using glutaraldehyde, technicians should always wear latex gloves for protection. (A) True (B) False B When using high-level disinfectants it is important to remember they may be deactivated by (A) dilution. (B) organic matter. (C) time. (D) all the above. B In an automated washer the key source of disinfection is ...

the physical material of the universe. It is anything that has mass and occupies space. - Matter is made up of relatively few elements. - Matter The smallest building block of matter. Smallest particle that retains the chemical property of the element (O, He, S). - Atom Each _______ is made of the same kind of atom - Element Combination of atoms held together in specific shapes - Molecule No fixed volume or shape, conforms to volume and shape of container, is compressible - Gas Individua...

Package Title: Hein Test Bank Course Title: Hein 14e Chapter Number: 3 Question type: Multiple Choice 1) All matter is composed of elements. Approximately how many elements are there? a) 4 b) 10 c) 68 d) 100 Answer: D Difficulty: easy Learning Objective 1: Define an element and write the chemical symbol for an element when given its name. Section Reference 1: Section 3.1 2) The smallest particle of an element that can exist is called a(n) ___. a) atom b) ferrul...

What are the group 1 metals known as? - Ans .The Alkali Metals Reactivity within the groups: - Ans .Alkali metals: reactivity increases as you go down, melting point/boiling point decreases as you go down Halogens: reactivity decreases as you go down and melting point/boiling point increases as you go down What properties do the group 1 metals have? - Ans .They all have similar properties as they all have one outer shell electron that is lost readily to form a +1 ion. They all have: ...

the physical material of the universe. It is anything that has mass and occupies space. - correct answer Matter is made up of relatively few elements. - correct answer Matter The smallest building block of matter. Smallest particle that retains the chemical property of the element (O, He, S). - correct answer Atom Each _______ is made of the same kind of atom - correct answer Element Combination of atoms held together in specific shapes - correct answer Molecule No fixed...