H. Chemistry Unit 2 Review | Baamboozle - Baamboozle

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Why isn't it possible to have an isotope of Cadmium-112.41?

112.41 is the atomic mass, an average of all isotopes. Isotopes would have a whole numbered mass.

What is the mass number of atom B?

7

What is the atomic number of this atom?

5

What is the mass number of this atom?

11

What element is atom A?

Sodium

An iron nail with a mass of 2.3 g sits in a chamber of oxygen until rust (iron oxide) forms. After the reaction, the rusted nail has a mass of 2.8 g. What is the percent composition of iron in this rust?

82% Iron

Is this atom neutral? Why?

Yes, because it has the same number of protons and electrons.

Compared to protons, neutrons have...

No charge and about the same mass.

What element is pictured here?

Boron

J.J. Thomson's work with the cathode ray tube led him to discover...

Negatively charged particles (electrons) with very little mass

In a neutral atom, what 2 subatomic particles are equal to the atomic number?

Protons & electrons.

An iron nail with a mass of 2.3 g sits in a chamber of oxygen until rust (iron oxide) forms. After the reaction, the rusted nail has a mass of 2.8 g. What mass of oxygen must have reacted?

0.50 g of oxygen

Which atom is an isotope of atom B?

D