Midterm Review Chemistry

Which particles can be found inside a nucleus

• neutrons and protons

• electrons and protons

• neutrons and protons

• positrons and electrons

As electrons move to higher shell, the energy will ___________

Neutrons are ________ charged

Which of the following elements have 7 valence electrons?

• sodium

• phosphorus

• nitrogen

• fluorine

Tags

NGSS.HS-PS1-1

One way to distinguish an sodium and a silver is by looking at the difference in reactivity.

• True

• False

When analyzing elements from top to bottom in any row on the periodic table, the general trend is ____________

• number of valence shell electrons and number of first shell electrons

• electronegativity values and number of first shell electrons

• number of valence shell electrons and atomic radii

• electronegativity values and atomic radii

Tags

NGSS.HS-PS1-1

All noble gases such as Xenon, Argon, Radon have no charges.

• Yes

• No

If two atoms are isotopes of the same element, the atoms must have

• the same number of protons and the same number of neutrons

• the same number of protons and a different number of neutrons

• a different number of protons and the same number of neutrons

• a different number of protons and a different number of neutrons

The law of conservation of mass states that

• in a chemical reaction mass and energy are conserved.

• mass will decrease overtime

• energy will decrease overtime

• both mass and energy will decrease overtime

Tags

NGSS.HS-PS1-7

Table sugar can be separated from a mixture of table sugar and sand at STP (standard temperature and pressure) by adding

• sand, stirring, and distilling at 100.°C

• sand, stirring, and filtering

• water, stirring, and distilling at 100.°C

• water, stirring, and filtering