H. Chemistry Unit 2 Review | Baamboozle - Baamboozle

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What is the mass number of atom B?

7

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

Negatively charged particles (electrons) with very little mass

Which atom is an isotope of atom B?

D

What is the atomic number of this atom?

5

What is the mass number of this atom?

11

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.

Compared to protons, neutrons have...

No charge and about the same mass.

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

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

Protons & electrons.

Is this atom neutral? Why?

Yes, because it has the same number of protons and 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 is the percent composition of iron in this rust?

82% Iron

What element is atom A?

Sodium

What element is pictured here?

Boron