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.
- Which of these are features of Mendeleev's periodic table? Select all correct answers Gaps left for undiscovered elements Generally ordered by relative atomic mass Generally ordered by relative abundance Changes made so that elements with similar chemical properties were grouped Grouped into rows of 8 elements
- a) Why did Mendeleev leave gaps in his periodic table? He was unsure on the order of some elements To make sure there were the same number of elements in each row To make sure there were the same number of elements in each column To allow elements with similar properties to line up in columns
- A reaction between dilute acid and calcium carbonate was carried out three times. Everything was kept the same each time except for the calcium carbonate , which was in the form of large chunks , small chunks or powder (though the mass used was constant). The table shows the results . What was the reaction time for the large chunks? Enter a number s
- A reaction between two particles cannot happen unless the particles have enough __ when they collide. What is the missing word? Enter your answer
- Which of the following periods has the least number of elements? a Second period b First period c Third period d Fourth period