Chemistry Homework Assistance

QuestionAI's chemistry problem solver is a middle school chemistry tutoring tool that summarises key chemical reactions and equations in real-time, featuring a robust learning system to empower even those with a weak foundation in chemistry.

You needn't fret over the elemental properties of the periodic table anymore. Here, you can effortlessly access chemical reactions and reaction principles corresponding to each element. Deductive reasoning from microscopic phenomena to discern the original structure of molecules and atoms is a research technique we staunchly champion.

(d) Lithium is heated and then cooled in an experiment. Lithium solid Stage 1 Lithium liquid d Stage 2 Lithium solid Two physical changes happen in the experiment. Draw one line from each stage to the physical change that happens in that stage. Stage Stage 1 Stage 2 Physical change Boiling Condensing Dissolving Freezing Melting

Q6. This question is about Group 1 elements. (a) What are the Group 1 elements known as? Tick (surd ) one box. Alkali metals square Halogens square Noble gases square

Key Stage 3 Science - Chemistry Question 14 of 20 As solids melt to form liquids, the porticles __ energy. What word completes this sentence? create goin lose gain

- The number of protons in an atom determines the identity of the atom. Atomic #= it Protons - In a neutral atom, the number of positive protons equals the number of negative electrons. # Protons = # Electrons - Protons and neutrons both have a mass of 1 amu. The mass of the electron is negligible compared to the mass of the proton and neutron. Thus, the mass number, or the mass of the atom, is the sum of the number of protons and neutrons. Mass # = Protons + # Neutrons Name & Symbol & Atomic # & Mass # & Protons & # Neutrons & #Electrons Selenium & & & & & 46 & & & & 222 & 86 & & & & & & & 118 & 79 & & 11 & & & 12 &

For each of the following reactions: CH_(3)COOH(aq)+O_(2)(g)arrow AlCl_(3)(s)+Cs(s)arrow HNO_(3)(aq)+Fe(OH)_(3)(s)arrow 1. Predict the products. 2. Write down the balanced equation. 3. Identify the type of the reaction. Edit