if an atom has 4 protons, 5 neutrons, and 4 electrons, what is the mass number of this atom? How do you know?

2-fluoro-1-chlorine-3-pentene

How many H atoms in 12H2O?

3. The density, d of an x-box 1 can be found by using the following formula d = m, where mis the mass of the x-box and v is its volume. What is the density of the x-box that has a mass of 73,430 kilograms and a volume of 7m3?

What is the nature of this chlorine ion?

How many squares are on 2 x 2 grid

What volume of 0.120 M HNO3 (qq) is needed to completely neutralize 150.0 milliliters of 0.100 M NaOH (aq)

What volume of a 0.4M solution can be prepared with 4.6 moles of sucrose? * How?

What experiments did Lavoisier do?

if an atom has 4 protons, 5 neutrons, and 4 electrons, what is the mass number of this atom? How do you know?

What volume of hydrogen gas can be produced by reacting 4.20 g of sodium in excess water at 50.0 Celsius and 106 kPa? The reaction is 2Na + 2H20 - - > 2NaOH + H2.