What element has 4 protons 5 neutrons and 4 electrons

As a sample of the radioactive isotope 131I decays, its half-life (1) decreases (2) increases (3) remains the same

What makes the Arrhenius acid and an Arrhenius base definition incomplete or lacking

Why is yeast a dependent variable when you are using it for baking and for the dough to rise.

Lividity in a dead body is caused by capillaries decaying due to de-oxygenation.

How many moles of methane are required to produce 22g co2 after combustion

Consider the reaction: Al2S3 + 6 HCl → 2 AlCl3 + 3 H2S The reaction has a 29.1% yield. How many grams of Al2S3 are needed to react with 30.0 moles of HCl? a) The molar mass of Al2S3 is 150.16 grams/mole. b) The molar mass of HCl is 36.46 grams/mole.

Why is Earth's temperature just right for life? A. Earth's core is hot enough to heat Earth's surface. B. Earth's magnetic field creates suitable temperatures on Earth's surface. C. Earth's crust is warmed by heat from the sun. D.

Which of the following is an example of a chernical change? Boiling water Burning paper Dissolving sugar in water Melting gold

Part a by drawing molecular orbital diagrams for b2, c2, n2, o2, and f2, predict which of these homonuclear diatomic molecules are magnetic.

A student states that non-metal atoms share their core electrons when they form covalent bonds. What is wrong with this statement? A. Atoms do not share electrons during covalent bonding. B.