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SCI ADV 3 - PMA 5

STRUCTURE AND PROPERTIES OF MATTER

QuestionAnswer
What are atoms made of? protons, electrons, and neutrons.
What are the 2 areas of the atom? nucleus and electron cloud.
What subatomic particles are found in the nucleus? protons and neutrons.
What is the atomic number of an atom? it is the identity of the atom. It is equal to the number of protons.
What is the atomic mass of an atom? it is the sum of the protons and neutrons.
What is an atom? an atom is the smallest unit of matter.
What are pure substances? elements and compounds are. They cannot be separated by physical means.
what are non-pure substances? homogenous and heterogenous mixtures are. You can separate them by physical means. Example: filtration, decantation, etc.
What is a homogeneous mixture? In this mixture you cannot see individual components. Example: salt water, blood, milk, air.
What is heterogeneous mixture? In this mixture you can easily see and separate the components. Example: granola bar, salad, soup.
Water density is 1g/mL. What happens to an object with a higher density than water? the object will sink. Example: Regular Coca-Cola.
Water density is 1g/mL. What happens to an object with a lower density than water? the object will float. Example: Diet Cola, wood, plastic.
What is Quantitative Data? Data that includes numbers. Example: 10 miles, 25 g/ml, 5cm3.
What is Qualitative Data? Data that includes descriptions. Example: the coffee is hot, the book is red.
What are some examples of physical properties? mass, volume, flexibility, density, melting point, and boiling point.
Which physical properties are useful to identify a substance? density, melting point, and boiling point because they don't change with the amount of sample.
What are elements made of? they are made of atoms of the same type. There are a finite number of elements (119).
What are compounds made of? they are made of 2 or more elements. Example: water, table salt.
What are some examples of chemical properties?? flammability, corrosivity, reactivity.
What is melting point? is a physical property. it involves the change in state, from solid to liquid.
what is boiling point? is a physical property. It involves the change in state, from liquid to gas.
Created by: user-1776559
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