chem

• What are some activities in the field of chemistry ? They measure proportions and reaction rates in order to understand unfamiliar substances and how they behave, or to create new compounds
• What is inorganic chemistry vs. organic chemistry ? Organic chemistry is defined as the study of carbon-containing compounds, inorganic chemistry is the study of the remaining subset of compounds
• What are the steps for solving a numeric word problem? Analyze, calculate, and evaluate
• What's a hypothesis? What is a theory ? A hypothesis is an assumption made before any research has been done. A theory is a principle formed to explain the things already shown in data
• What are the steps to the scientific method? Observation, question, hypothesis, experiment, data analysis, conclusion.
• What are theories? Are theories facts or can theories be changed? Theories are tested facts, they cannot be changed unless new evidence is compatible with the theory
• What is evaluated after an experiment is repeated? Data, as it becomes more accurate and refined
• "Water boils at a higher temperature than ethanol." How would you classify this as an observation, law, theory or experiment ? Observation
• What are the 3 states of matter and how do they differ? Solid, liquid, gas
• What are physical properties of matter? Color, malleability, solubility, electrical conductivity, density, melting point, and boiling point
• What are the physical properties of water? Water is polar, excellent solvent and high heat capacity.
• What is a substance ? Mixture? A mixture is a physical combination of two or more pure substances in which each substance retains its own chemical identity
• What happens during a chemical reaction? What suggests a chemical reaction has occurred? A chemical reaction is a change in the composition of a substance. Observations that indicate a chemical change has occurred include color change, temperature change, and formation of a precipitate
• In a reaction, what are reactants and products? Reactants are the substances that undergo a chemical change, while products are the substances that are formed as a result of the reaction.
• What is the chemical symbol for sodium? Potassium? Tin? Manganese? Na, K, Sn, Mn
• Why does a basketball have more mass than a golf ball?

  A basketball has more density than a golf ball
• What are the properties of a gas? Solid? Liquid?(Shape and volume)Solids have a definite shape and volume. Liquids have a definite volume, but take the shape of the container. Gases have no definite shape or volume.
• What’s a homogeneous mixture? Heterogeneous mixture? Homogeneous mixture: A mixture that has a uniform composition and properties throughout. Heterogeneous mixture: A mixture that has non-uniform composition and properties throughout.
• What happens when Fe combines with oxygen? Iron oxide is formed. The rusting iron is a chemical change because two substances reacted together to create a new substance.
• Activities in the field of chemistry measure proportions and reaction rates in order to understand unfamiliar substances and how they behave, or to create new compounds.
• Inorganic chemistry is the study of the remaining subset of compounds, while organic chemistry is the study of carbon-containing compounds.
• The steps for solving a numeric word problem are: Analyze, calculate, and evaluate.
• Iron (Fe) has 8 electrons in the 3d sublevel.
• The elements that contain f subshell valence electrons are Lanthanides (Lanthanum, La) and actinides (Actinium, Ac).
• Scientific law is a statement that describes a natural phenomenon or relationship that has been repeatedly observed and confirmed through experiments.
• The electronic configuration of Chlorine is 1s^2 2s^2 2p^6 3s^2 3p^5.
• A hypothesis is an assumption made before any research has been done, while a theory is a principle formed to explain the things already shown in data.
• The scientific method involves: Observation, question, hypothesis, experiment, data analysis, conclusion.
• Theories are tested facts, they cannot be changed unless new evidence is compatible with the theory.
• After an experiment is repeated, the data is evaluated, as it becomes more accurate and refined.
• Water boils at a higher temperature than ethanol, therefore this can be classified as an observation.
• The three states of matter are: Solid, liquid, gas.
• Physical properties of matter include: color, malleability, solubility, electrical conductivity, density, melting point, and boiling point.
• Physical properties of water include: colorless, orderless, polar, excellent solvent, and high heat capacity.
• A mixture is a physical combination of two or more pure substances, with two types of mixtures: homogeneous and heterogeneous.
• A chemical reaction is a change in the composition of a substance, with observations that indicate a chemical change have occurred including color change, temperature change, and formation of a precipitate.
• In a reaction, reactants are the substances that undergo a chemical change, while products are the substances that are formed as a result of the reaction.
• The chemical symbol for sodium (Na), potassium (K), tin (Sn), and manganese (Mn) are all different.
• A basketball has more mass than a golf ball because a basketball has more density than a golf ball.
• The charge on the nucleus of an atom is always positive.