The graph represents how the potential energy changes with respect to two species interacting. Determine which of the following statements are true about the graph below. The graph shows electrostatic repulsion The graph shows electrostatic attraction The two species have charges of the same sign.

Use the periodic table below to determine what the arrows are pointing to. Table of Choices   Arrow A Arrow B Arrow C A alkaline earth metals a non-metal halogens B alkali metal a non-metal noble gases C alkali metals a transition metal noble gases D alkaline earth metal a transition metal halogens E a non-metal a transition metal noble gases

Ethanol (C2H5OH) burns in oxygen to produce carbon dioxide and water. Balance the equation for this reaction using small, whole numbers. What is the coefficient of ethanol in the balanced equation? __C2H5OH  +  __ O2 

Use the periodic table below to determine what the arrows are pointing to.  Table of Choices   Arrow A Arrow B Arrow C A alkaline earth metals a non-metal noble gases B alkali metal a non-metal halogens C alkali metals a transition metal halogens D alkaline earth metal a transition metal noble gases E a non-metal a transition metal halogen

Which of the following substances is/are mixture(s)?   

What criteria are most important to consider when small, charged particles approach one another? Mass Charge of particles Distance between particles Number of particles

A student is trying to construct an argument to support the following claim “particles in the atom are negatively charged”. What experiment and reasoning below would best assist the student with making their argument. Experiment: Cathode ray tube Gold foil Reasoning: It showed a bend in the beam of particles could occur when emitted. It showed that electrons were emitted from the atom regardless of the metal used. It showed that there was something small and positively charged in the middle of the atom that deflected a small number of particles that were passing through the atom. It showed that all atoms emit the same beam of particles regardless of the source of alpha particles.

A student is trying to construct an argument to support the following claim “that all atoms have electrons”. What experiment and reasoning below would best assist the student with making their argument. Experiment: Cathode ray tube Gold foil Reasoning: It showed that a bend in the beam of particles could occur when emitted. It showed that electrons were emitted from the atom regardless of the metal used. It showed that there was something small and positively charged in the middle of the atom that deflected a small number of particles that were passing through the atom. It showed that all atoms emit the same beam of particles regardless of the source of alpha particles.

Using the image below to determine which of the following statements is/are true. Substance A represents molecular compounds Substance B represents atoms of an element Substance C represents molecular compounds 

Which statement is true about 10.0 g of nitrogen gas (N2) and 10.0 g of water (H2O)?