Chemistry Basics Quiz

The study of matter and the changes it undergoes.

Consisting of general observations about the system.

Comprising of numbers obtained from various measurements of the system.

<p>Anything that occupies space and has mass.</p> Signup and view all the answers

<p>A combination of two or more substances in which the substances retain their distinct identities.</p> Signup and view all the answers

<p>The composition of the mixture is the same throughout.</p> Signup and view all the answers

<p>The composition is not uniform.</p> Signup and view all the answers

<p>A substance that cannot be separated into simpler substances by chemical means.</p> Signup and view all the answers

<p>A substance composed of atoms of two or more elements chemically united in fixed proportions.</p> Signup and view all the answers

<p>Can be measured and observed without changing the composition or identity of a substance.</p> Signup and view all the answers

<p>In order to observe this property, we must carry out a chemical change.</p> Signup and view all the answers

<p>The SI base of temperature.</p> Signup and view all the answers

<p>0 K or -273.15 degrees Celsius, the theoretical lowest temperature.</p> Signup and view all the answers

<p>How close a measurement is to the true value of the quantity that was measured.</p> Signup and view all the answers

<p>How closely two or more measurements of the same quantity agree with each other.</p> Signup and view all the answers

<p>The meaningful digits in a measured or calculated quantity.</p> Signup and view all the answers

<p>Different samples of the same compound always contain its constituent elements in the same proportion by mass.</p> Signup and view all the answers

<p>Matter is neither created nor destroyed.</p> Signup and view all the answers

<p>The basic unit of an element that can enter into chemical combination.</p> Signup and view all the answers

<p>The emission and transmission of energy through space in the form of waves.</p> Signup and view all the answers

<p>Spontaneous emission of particles/radiation.</p> Signup and view all the answers

<p>The number of protons in the nucleus of each atom of an element.</p> Signup and view all the answers

<p>The total number of neutrons and protons present in the nucleus.</p> Signup and view all the answers

<p>Atoms that have the same atomic number but different mass numbers.</p> Signup and view all the answers

<p>A chart in which elements having similar chemical and physical properties are grouped together.</p> Signup and view all the answers

<p>Horizontal rows on the periodic table.</p> Signup and view all the answers

<p>Elements in a vertical column which also have similar chemical properties.</p> Signup and view all the answers

<p>Group 1A elements.</p> Signup and view all the answers

<p>Group 2A elements.</p> Signup and view all the answers

<p>Elements in group 7A.</p> Signup and view all the answers

<p>Elements in group 8A.</p> Signup and view all the answers

<p>A substance formed when an atom or molecule gains or loses electrons.</p> Signup and view all the answers

<p>Charged particle formed when an atom or molecule gains or loses electrons.</p> Signup and view all the answers

<p>An ion with a positive charge.</p> Signup and view all the answers

<p>An ion with a negative charge.</p> Signup and view all the answers

<p>Expresses the composition of molecules and ionic compounds in terms of chemical symbols.</p> Signup and view all the answers

<p>Shows the exact number of atoms of each element in the smallest unit of a substance.</p> Signup and view all the answers

<p>Tells us which elements are present and the simplest whole number ratio of their atoms, but not necessarily the actual number of atoms in a given molecule.</p> Signup and view all the answers

<p>The mass of the atom in atomic mass units (also grams).</p> Signup and view all the answers

<p>The sum of the atomic masses in the molecule, can be used the same way as the atomic mass.</p> Signup and view all the answers

<p>The amount of a substance that contains as many particles as there are atoms in exactly 12 grams of the carbon-12 isotope.</p> Signup and view all the answers