Which of the following is true of alpha decay?*

0 It is the most penetrating form of radiation

O It has a negative particle

O It is equivalent to a helium nucleus (2 protons and 2 neutrons)

O It is a form of electromagnetic energy

Convert 1.422g/cm^2 to mg/mm^2

The empirical formula that contains 120 g of carbon and 30.3 g of hydrogen

Which one of the following ia a characteristic of a metal?

There is only one compound that is named 1,2-diiodoethane, but there are two distinct compounds that can be named 1,2-diiodoethene. Why? Because 1,2-diiodoethane has more hydrogen atoms.

What are the ex some physical properties of sandpaper?

According to the following reaction, how many grams of hydrogen peroxide ( H 2 O 2 ) are necessary to form 0.182 moles oxygen gas? hydrogen peroxide ( H 2 O 2 ) (aq) → water (l) + oxygen (g)

Using the bohr model describe the changes in electrons energy and electron location when an atom changes from the ground state to an excited state.

Sally is making a model of gold for her chemistry class. She has foam balls for the protons, neutrons, and electrons. She has added 70 protons to her model so far. How many more protons does she need to add to complete her neutral atom of gold?

How many electrons are in an atoms of germanium

What is the lewis structure of N2O3?