In Lewis dot diagrams, valence electrons are represented by dots around the atomic symbol. How many electrons should around an aluminum ion?

What is called mother liquor in a chemistry lab? a. The supersaturated solution that forms when the hot solution cools down. b. The hot saturated solution in the beginning of recrystallization. c. The ethanol-water solvent used for recrystallization.

Which energy changes are associated with a liquid freezing?

How do you convert mass to moles?

Which factors have the greatest effect on the rate of a chemical reaction between AgNO3 (aq) and Cu (s) ?

Which of the following describes the formation of an ionic bond? atoms with like charges combine to form ions. two ions combine and share electrons equally. neutral atoms combine to form a stable molecule.

2. Seorang ibu perlu menyediakan satu hidangan kari daging dengan cepat untuk anaknya yang lapar. Langkah manakah yang berikut dapat membantu dia mencapai tujuan ini? (CL01, C2) A. Menggunakan periuk yang lebih besar B. Menambah banyak serbuk kari C.

Which of the following statements is not true? Question 4 options: When atoms have similar electronegativities, electrons are shared equally When electrons are shared equally, the molecule is called a nonpolar molecule.

Write the isotope symbol for two isotopes of the same element. What makes the isotopes different? How are they similar?

According to the periodic table, which element has an atomic number of 40? a. u b. ca c. zr d. np

3. Which word best fits with the Earth's day and night cycle a. Revolution b. Rotation C Orbit d. Axis