chemistry Flashcards
What is the atomic number of carbon?
6
True or False: The pH scale measures the acidity or alkalinity of a solution.
True
Fill in the blank: The process of a liquid turning into a gas is called _____
evaporation
What is the chemical formula for water?
H2O
Which of the following is an alkali metal: Lithium, Chlorine, or Gold?
Lithium
What is the main gas produced by photosynthesis?
Oxygen
Define an element.
A pure substance made up of only one type of atom
What is the name of the process where solid turns directly into gas?
sublimation
True or False: All acids taste sour.
True
What is the periodic table used for?
To organize all known chemical elements based on their properties.
Which part of the atom has a positive charge?
Proton
Fill in the blank: The _____ is the center of an atom.
nucleus
What is the chemical symbol for sodium?
Na
What type of bond involves the sharing of electron pairs between atoms?
Covalent bond
What is the process of a gas turning into a liquid called?
condensation
Identify the following as an element, compound, or mixture: NaCl.
Compound
What is the primary component of air?
Nitrogen
True or False: Metals are typically good conductors of electricity.
True
What is the name of the reaction that occurs when an acid and a base react together?
Neutralization
Which gas is produced during respiration?
Carbon dioxide
What is the main purpose of a catalyst in a chemical reaction?
To speed up the reaction without being consumed.
What does the term ‘saturated solution’ mean?
A solution that cannot dissolve any more solute at a given temperature.
Fill in the blank: The smallest unit of an element is called an _____.
atom
What is the chemical formula for carbon dioxide?
CO2
