What is the mass number for the element? Protons: 2 Neutrons: 1 Electrons: 2

A.) 2

B.) 3

C.) 4

D.) 5

Read the list of substances. Spoon, Styrofoam cup, Scissors, Pencil Which substances are likely to float in water?

What does one rotation of earth equal?

Which substance has the lowest [H+] concentration but is still considered an acid? milk blood gastric fluid household lye

Pure gold has a density of 19.32 g/cm3. How large would a piece of gold be if it had a mass of 318.97g

What is the chemical formula for lead (IV) oxide? A) PbO2 B) PbO4 C) Pb2O D) Pb4O

What is hybridisation

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